Bit-loading algorithms and SNR estimate for HomePlug AV

In this paper two different bit-loading algorithms with uniform power allocation are compared within the framework of the HomePlug AV system. Both algorithms try to maximize the overall throughput: the first one guarantees a target mean BER, while the second guarantees a target BER per sub-carrier. By means of simulations, we compare the performance of the two algorithms, in terms of throughput and BER versus average SNR under a realistic power-line channel model. Results show that, when ideal SNR knowledge is assumed, the first and more complex algorithm offers a greater throughput; however, when SNR estimate is included, the performance of the two algorithms gets closer.