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This work presents a 2nd-order, multi-bit Continuous-time Quadrature Bandpass Delta-Sigma (CT QBP ΔΣ) modulator with a Pseudo-random Quadrature Mismatch Shaping (PQMS) algorithm for GSM-EDGE/Bluetooth Low-IF receiver. CT QBP ΔΣ modulator is vulnerable to mismatches between its in-phase and quadrature (I/Q) paths that can dramatically degrade its Signal to Noise-plus-Distortion Ratio (SNDR) and image-rejection...
This paper proposes an advanced OFDM-MIMO reconfigurable architecture that uses an adaptive switching algorithm between diversity and spatial multiplexing. The transmitter blocs' specifications such as the MIMO technique and the modulation scheme are adjusted according to the channel state, which gives a practical cognitive radio strategy. The system cost- efficiency is performed by the application...
A novel infinite-series-based approach for the performance analysis of a dual-branch switched-and-stay combining (SSC) diversity receiver operating over Ricean correlated fading channels in the presence of correlated Nakagami-m distributed co-channel interference (CCI) is presented. The performance analysis is based on outage probability (Pout) and average bit error probability (ABEP) criteria.
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