Abstract:

An improved threshold adjustment (ITA) algorithm is proposed, it can precisely guarantee the predefined frame error rate (FER) for pilot-assisted adaptive modulation and coding (AMC). An autoregressive (AR) model is introduced to improve the link prediction performance of ITA. Numerical and Link level simulation show that ITA can converge to the predefined FER, while Threshold Adjustment AMC algorithm proposed by 3GPP deviate the predefined FER. When feedback delay is large than 10ms. ITA algorithm with AR prediction could obtain higher throughput and more accurate FER performance than the one without AR prediction.

Key words: adaptive modulation and coding, autoregressive model, frame error rate, code division multiple access