Various of multicanier modulation scheme may be used to bit rate increases of Broadband PLC channel. One of the schemes is the Pulse-Shaped OFDM (PS-OFDM). There is an important parameter in the PSOFDM that influence ...
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ISBN:
(纸本)9781479989751
Various of multicanier modulation scheme may be used to bit rate increases of Broadband PLC channel. One of the schemes is the Pulse-Shaped OFDM (PS-OFDM). There is an important parameter in the PSOFDM that influence the increasing in bit rate on the PLC channel, the guard interval, and the number of sub channels. This paper discusses performance of the system against the effects of code rate, multipath propagation channel on Broadband PLC channel, and the effect of the guard interval of data transmission speed. Simulation results confirm that PS-OFDM technique offer a fine performance, where minimum BER achieved on 22 dB up to 24 dB of SNR, and maximum data rate on 41,033 Mbps achieved for 16-QAM mapper by 1/16 guard interval.
In [1] a new family of error detection codes called Weighted Sum Codes was proposed. In [2] it was noted, that these codes are equivalent to lengthened Reed Solomon Codes, and shortened versions of lengthened Reed Sol...
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ISBN:
(纸本)078037763X
In [1] a new family of error detection codes called Weighted Sum Codes was proposed. In [2] it was noted, that these codes are equivalent to lengthened Reed Solomon Codes, and shortened versions of lengthened Reed Solomon codes respectively over GF (2((h/2))). It was also shown that it is possible to use these codes for correction of one error in each code-word over GF(2((h/2))). In [3] a class of modified Generalized Weighted Sum Codes for single error and conditionally double error correction Were presented. In this paper we present a new family of double error - correcting codes with code distance d(m) = 5. Weight spectrum for [60,49,5] code constructed over GF(8) which is an example of the new codes was obtained by computer. The coderate of the new codes are higher than the coderate of ordinary Reed Solomon codes over the same finite fields.
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