Channel Codes
Channel codes are a very important component of any modern digital communication system, and they make today's effective and reliable wireless communications possible. There are several books that concentrate on different channel coding approaches [7, 9, 10, 17, 20]. The basic measure of channel coding performance is coding gain, which is usually measured in dBs as the reduction of required 
to achieve a certain bit error rate in AWGN channel. As an example, IEEE 802.11a could use two methods to achieve 12 Mbits/s data rate. The simplest way would be to use uncoded BPSK modulation on each subcarrier, therefore each OFDM symbol would ...
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