Rate-Adaptive Coded Multiuser OFDM for Downlink Wireless Systems
A multiuser OFDM system using rate-adaptive codes is described and proposed for the wireless downlink. The code rate is adaptively modified according to the number of active users. The system offers enhanced error protection at partial load. As a result, the bit error rate is reduced and less transmit power is required, reducing the interference level at other cells.
KeywordsFading Channel Channel State Information Code Rate Orthogonal Frequency Division Multiple Access Convolutional Code
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