Abstract:

In order to reduce the computational complexity and improve the spectrum efficiency of the conventional selected mapping (CSLM) algorithm in orthogonal frequency division multiplexing (OFDM) systems, a low complexity block selected mapping (BSLM) algorithm based on blind detection is proposed. In the method, the transmitting part only needs a few low-dimensional inverse fast fourier transform (IFFT) operations to obtain a lot of alternative sequences, at the same time, the receiving part uses a modified blind detection to reduce the complexity. The performance of the peak to average power rate (PAPR), cubic metric (CM) and bite error rate (BER) is analyzed. Simulations show that the proposed method can not only reduce the computational complexity significantly, but also control PAPR and CM of the OFDM signal effectively, as well as it can obtain similar BER performance to that of the conventional SLM with perfect side information.