Utility-optimization dynamic subcarrier allocation algorithm for SC-FDMA systems |
| |
Institution: | School of Information & Communication Engineering, Harbin Engineering University, Harbin 150001, P. R. China |
| |
Abstract: | Two utility-optimization dynamic subcarrier allocation(DSA) algorithms are designed for single carrier frequency division multiple access system(SC-FDMA).The two proposed algorithms aim to support diverse transmission capacity requirements in wireless networks,which consider both the channel state information(CSI) and the capacity requirements of each user by setting appropriate utility functions.Simulation results show that with considerable lower computational complexity,the first utility-optimization algorithm can meet the system capacity requirements of each user effectively.However,the rate-sum capacity performance is poor.Furthermore,the second proposed utility-optimization algorithm can contribute a better trade-off between system rate-sum capacity requirement and the capacity requirements of each user by introducing the signal to noise ratio(SNR) information to the utility function based on the first utility-optimization algorithm,which can improve the user requirements processing capability as well as achieve a better sum-rate capacity. |
| |
Keywords: | single carrier frequency division multiple access (SC-FDMA) dynamic subcarri-er allocation (DSA) utility function transmission capacity requirements utility-optimization algo-rithm greedy algorithm proportional fair algorithm |
本文献已被 CNKI 维普 等数据库收录! |
|