Fig. 4From: Enhanced interpolation-based interference rejection combining for black-space cognitive radio in time-varying channelsPerformance of QPSK and 64QAM BS-CR systems for SIR {− 10, − 30} dB with or without covariance matrix interpolation. a 0 and 3 km/h CR receiver mobilities. b 0 and 10 km/h CR receiver mobilities. Silent gap length of 16 symbols, and OFDM frame length of 17 symbolsBack to article page