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1st International Conference on Computational Advancement in Communication Circuits and Systems (ICCACCS)

作者： Phadikar, Amit Jana, Poulami Maity, Goutam K. MCKV Inst Engn Dept IT Liluah Howrah India Bengal Inst Technol Dept ECE Kolkata India MCKV Inst Engn Dept ECE Liluah Howrah India

ISBN: (纸本)9788132222743;9788132222736

Reversible data embedding has drawn lots of interest recently especially in the field of protection for cultural heritage and medical image. Being reversible, the original digital content can be completely restored. This paper proposes Tian's algorithm of difference expansion as a reversible watermarking scheme for the cultural heritage image. Lifting together with convolution coding is used to increase the detection performance of watermark bits. Experimental results and performance comparison with other reversible data hiding schemes are presented to demonstrate the validity of the proposed algorithm.

关键词： Reversible watermarking Lifting convolution coding Viterbi decoding

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Cancelable Fingerprint Cryptosystem Based on convolution coding 2nd

Cancelable Fingerprint Cryptosystem Based on Convolution Cod...

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2nd International Symposium on Signal Processing and Intelligent Recognition Systems (SIRS)

作者： Sandhya, Mulagala Prasad, Munaga V. N. K. Inst Dev & Res Banking Technol Rd 1Castle Hills Hyderabad 500057 Andhra Pradesh India Univ Hyderabad Sch Comp & Informat Sci Prof CR Rao Rd Hyderabad 500046 Andhra Pradesh India

ISBN: (纸本)9783319286587;9783319286563

In this paper we propose a fingerprint bio-cryptosystem with cancelability using fuzzy commitment scheme. The minutiae of a fingerprint are transformed using Delaunay triangulation net constructed from fingerprint minutiae. Further, these transformed features are encrypted using convolution coding. During decoding phase, the Viterbi algorithm is used to get the codeword. Experimental evaluation done on FVC 2002 databases show the credibility of the proposed method. The EER obtained for the proposed method is 1.66%, 1.89% and 6.87% for FVC 2002 DB1, DB2, and DB3 respectively.

关键词： Template protection Fuzzy commitment scheme convolution coding Viterbi algorithm Delaunay triangulation

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A convolution coding scheme for PAR reduction in WLAN-OFDM system

A convolution coding scheme for PAR reduction in WLAN-OFDM s...

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International Conference on Intelligent Pervasive Computing (IPC 2007)

作者： Lee, Jae-Kwon Park, Jeong-Sang Kim, Jin-Up Univ Sci & Technol Taejon South Korea Elect & Telecommun Res Inst Taejon South Korea

ISBN: (纸本)9780769530062

Orthogonal frequency division multiplexing (OFDM) is used to achieve the high-speed data transmission over fading channel. However, the main disadvantage of OFDM system is the high peak-to-average power ratio (PAR). This paper proposes a novel scheme based on convolution coding scheme and multiple signal representation (MSR) method which can be used for PAR reduction. Since the proposed scheme does not require the additional bit for PAR reduction, the proposed scheme provides the same code-rate as the conventional convolution coding scheme. Simulation results show that the proposed scheme reduces the PAR value while its BER performance is almost the same as the conventional convolution coding scheme.

关键词： orthogonal frequency division multiplexing convolution coding multiple signal representation

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WATERMARKING ON COMPRESSED DATA INTEGRATING convolution coding IN INTEGER WAVELETS

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INTERNATIONAL JOURNAL OF WAVELETS MULTIRESOLUTION AND INFORMATION PROCESSING 2012年第6期10卷 1250051-1250051页

作者： Maity, Santi P. Delpha, Claude Boyer, Remy Bengal Engn & Sci Univ Dept Informat Technol Sibpur 711103 Howrah India Univ Paris 11 CNRS Supelec Lab Signaux & Syst F-91192 Gif Sur Yvette France

This paper explores the scope of integer wavelets in watermarking on compressed image with the aid of convolution coding as channel coding. convolution coding is applied on compressed host data, instead of its direct application on watermark signal as used widely for robustness improvement in conventional system. Two-fold advantages, namely flexibility in watermarking through the creation of redundancy on the compressed data as well as protection of watermark information from additive white Gaussian noise (AWGN) attack are achieved. Integer wavelet is used to decompose the encoded compressed data that leads to lossless processing and creation of correlation among the host samples due to its mathematical structure. Watermark information is then embedded using dither modulation (DM)-based quantization index modulation (QIM). The relative gain in imperceptibility and robustness performance are reported for direct watermark embedding on entropy decoded host, using repetition code, convolution code, and finally the combined use of channel codes and integer wavelets. Simulation results show that 6.24 dB (9.50 dB) improvement in document-to-watermark ratio (DWR) at watermark power 12.73 dB (16.81 dB) and 15 dB gain in noise power for watermark decoding at bit error rate (BER) of 10(-2) are achieved, respectively over direct watermarking on entropy decoded data.

关键词： QIM watermarking compressed data convolution coding integer wavelets nonlinear mapping

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8-QAM Software Defined Radio Based Approach for Channel Encoding and Decoding Using Forward Error Correction

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WIRELESS PERSONAL COMMUNICATIONS 2013年第4期72卷 2957-2969页

作者： Marriwala, Nikhil Sahu, O. P. Vohra, Anil Kurukshetra Univ Univ Inst Engn & Technol Elect & Commun Engn Dept Kurukshetra 132119 Haryana India NIT Elect & Commun Engn Dept Kurukshetra Haryana India Kurukshetra Univ Dept Elect Sci Kurukshetra 132119 Haryana India

The aim of this paper is to use a software defined radio (SDR) based approach in order to select channel encoding and decoding method accordingly using 8-QAM (Quadrature Amplitude Modulation) in terms of bit error rate (BER). By selecting a higher order format of QAM, we are able to carry more bits of information per symbol;also the data rate can be increased thus achieving greater distance between adjacent points in the I-Q plane by distributing the points more evenly. Hence the constellation points are more distinct and data errors are reduced. In the present work 8-QAM is chosen as modulation scheme so that balance can be maintained between higher data rates while maintaining an acceptable bit error rate for SDR. Channel coding schemes forward error correction are used where the re-transmission of the data is not feasible, thus redundant bits are added along with the message bits and transmitted through the channel. On the receiver side, this channel coded signal is decoded in order to get back the original data even if the channel coded signal undergoes some interference from the noise in the transmission medium. The performance is then analyzed in terms of BER for Hamming and convolution coding algorithms at a particular value of SNR in LabVIEW graphical programming. With the help of LabVIEW we were able to design the systems in a block-based manner in shorter time as compared to the commonly used text-based programming languages.

关键词： SDR 8-QAM Hamming coding convolution coding BER

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Multimedia multicast wireless communications with phase-shift-key modulation and convolutional coding

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IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS 1999年第11期17卷 1999-2010页

作者： Pursley, MB Shea, JM Clemson Univ Dept Elect & Comp Engn Clemson SC 29634 USA Univ Florida Dept Elect & Comp Engn Gainesville FL 32611 USA

Broadcast or multicast signaling can be employed in a wireless communication network to transmit a message to multiple neighbors simultaneously. The capabilities of the intended recipients may vary in the sense that the communication links to some neighbors may have less interference or attenuation than the links to others We have previously proposed the use of nonuniform phase-shift key (PSK) signal constellations to allow a transmitter to deliver a basic message to each of the intended receivers and an additional message to the more-capable receivers. In this paper, convolutional coding and nonuniform PSK modulation are combined to provide greater efficiency and increased flexibility. The primary goal of multicast transmission, which is for each designated neighbor to have an acceptable probability of receiving the multicast message correctly, is achieved in a way that permits inclusion of multimedia messages for the more-capable receivers, Performance results and tradeoffs are presented for hard- and soft-decision decoding of convolutionally encoded coherent M-ary PSK multicast transmissions, Our results show that convolutional coding can be used with nonuniform PSK modulation to transmit additional information in mobile communication systems with little degradation to the basic information.

关键词： convolution coding mobile communication multicast transmission multimedia transmission nonuniform phase-shift-keying phase-shift-keying

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Novel Real-Time Decision-Based Carrier Tracking for Software-Defined Radios Using M-ARY QAM Modulation

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INTERNATIONAL JOURNAL OF DECISION SUPPORT SYSTEM TECHNOLOGY 2023年第1期15卷 1-31页

作者： Marriwala, Nikhil Kousalya, Gnana C. Rajasekar, B. Nandhitha, N. M. Gautam, Ashu Sangwan, Aarti Kurukshetra Univ Univ Inst Engn & Technol Kurukshetra Haryana India St Josephs Inst Technol Chennai Tamil Nadu India Sathyabama Inst Sci & Technol Dept Elect & Commun Engn Chennai Tamil Nadu India Sathyabama Inst Sci & Technol Sch Elect & Elect Engn Chennai Tamil Nadu India GD Goenka Univ Sohna India Cent Univ Haryana Mahendergarh India

In this paper, a scalable and real-time decision-based carrier tracking for software defined radio (SDR) for M-ary QAM modulation has been proposed and tested in real-time using the universal software radio peripheral (USRP)-2922. The proposed system provides real-time decision-based carrier tracking for improved efficiency and performance. The real-time transfer of data has been done using the USRP-2922 hardware using the M-ary QAM modulation scheme for data transmission. The novelty of the proposed system is that one can transfer random data (binary bits), text or an image which can be encoded using the desired forward error correction codes (FEC) namely the convolution coding/Viterbi soft decision decoding and the turbo coding/decoding. The proposed novel SDR transceiver system with real-time decision-based carrier tracking shows an improved performance for different parameters such as the bit error rate (BER) and signal to noise ratio (Eb/No).

关键词： Bit Error Rate convolution coding Decision-Based SDR Carrier Tracking FEC Codes Graphical User Interface M-QAM Turbo coding

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Image error concealment and quality access control based on data hiding and cryptography

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TELECOMMUNICATION SYSTEMS 2012年第2期49卷 239-254页

作者： Phadikar, Amit Maity, Santi P. Delpha, Claude Univ Paris 11 CNRS Signaux & Syst Lab SUPELEC F-91192 Gif Sur Yvette France MCKV Inst Engn Dept Informat Technol Liluah 711204 Howrah India Bengal Engn & Sci Univ Dept Informat Technol Sibpur 711103 Howrah India

This paper proposes a data hiding scheme that integrates the dual purpose of error concealment and quality access control of digital image(s) in a single platform. The objective is achieved through the extraction of some important information from the original image itself followed by embedding the same in the host data as watermark which in turn increases sufficient redundancy in the transmitted image. The data embedding is done by modulating integer wavelet coefficients using quantization index modulation (QIM). The watermarked integer wavelet coefficients are then encoded using convolution coding at high code rate. Before data embedding, the important information (watermark) is also encoded with convolution coding and is encrypted using chaotic logistic mapping. The necessary information in the form of the secret key (K) is further encrypted using a public key (P) cryptology for its secret transmission to the receiver. The user who has the knowledge of the secret key (K) can decrypt the hidden information for the concealment purpose, while the users having different partial knowledge of the key (K) enjoy relative qualities of the images by partial recovery of the damaged regions. The simulation results have shown the validity of the claim. The performance of the proposed scheme is also tested in Rayleigh-fading wireless channel and compared with the few other methods.

关键词： Error concealment Access control Data hiding QIM Cryptography convolution coding Viterbi decoding Lifting

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Image content authentication based on channel coding

Image content authentication based on channel coding

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International Conference on Photoelectronic Detection and Imaging

作者： Fan Zhang Lei Xu Henan Univ Coll Comp & Informat Engn Kaifeng 475001 Peoples R China Tianjin Univ Coll Elect & Informat Engn Tianjin 300072 Peoples R China Zhejiang Engn Design Ltd Hangzhou 310000 Zhejiang Peoples R China

ISBN: (纸本)9780819467652

The content authentication determines whether an image has been tampered or not, and if necessary, locate malicious alterations made on the image. Authentication on a still image or a video are motivated by recipient's interest, and its principle is that a receiver must be able to identify the source of this document reliably. Several techniques and concepts based on data hiding or steganography designed as a means for the image authentication. This paper presents a color image authentication algorithm based on convolution coding. The high bits of color digital image are coded by the convolution codes for the tamper detection and localization. The authentication messages are hidden in the low bits of image in order to keep the invisibility of authentication. All communications channels are subject to errors introduced because of additive Gaussian noise in their environment. Data perturbations cannot be eliminated but their effect can be minimized by the use of Forward Error Correction (FEC) techniques in the transmitted data stream and decoders in the receiving system that detect and correct bits in error. This paper presents a color image authentication algorithm based on convolution coding. The message of each pixel is convolution encoded with the encoder. After the process of parity check and block interleaving, the redundant bits are embedded in the image offset. The tamper can be detected and restored need not accessing the original image.

关键词： authentication image convolution coding forward error correction

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An analysis of BER comparison of various digital modulation schemes used for adaptive modulation 1

An analysis of BER comparison of various digital modulation ...

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IEEE International Conference on Recent Trends in Electronics, Information and Communication Technology (RTEICT)

作者： Rajesh, M. N. Shrisha, B. K. Rao, Nishith Kumaraswamy, H. V. RVCE Dept Telecommun Bangalore Karnataka India

ISBN: (纸本)9781509007745

In this paper, a comparative analysis of BER performance of various higher order digital modulation techniques for channel utilization is proposed and the analysis are carried out with SNR as the reference parameter. This performance analysis yields to adaptive modulation technique which can be used to attain high spectral efficiency by modulating the signal at higher order modulation schemes based on channel state information (CSI) from the receiver. Signal over AWGN channel is assumed for the analysis. To achieve lower BER values for a specific SNR, techniques to alter signal characteristics like pulse shaping filters, matching filters and convolution encoding are applied and analysis are carried out. An observation from the above analysis produces lower BER. For 256-QAM at SNR of 20, BER of 4.76X10(-3) and grey coded BER of 3.83X10(-4) is obtained. Highest possible modulation technique is selected with lower BER obtained. Thus, spectral efficiency which is the prime objective of the proposed paper is achieved. The above results are computed and simulated using MATLAB.

关键词： Adaptive modulation channel state information (CSI) bit error rate (BER) signal to noise ratio (SNR) pulse shaping and match filters convolution coding

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