Fig. 2From: Enhanced interpolation-based interference rejection combining for black-space cognitive radio in time-varying channelsPerformance of QPSK BS-CR systems with known channel-based and sample covariance-based approaches for SIR = − 30 dB considering block fading channel (no-mobility) with silent gap lengths of 8, 16, 32 and 128 symbols, and OFDM frame length of 17 symbolsBack to article page