Cognitive radios hold tremendous promise for increasing the spectral efficiency of wireless communication systems. In this paper, an adaptive bit allocation algorithm is presented for orthogonal frequency division multiplexing (OFDM) CR systems operating in a frequency selective fading environment. The algorithm maximizes the CR system throughput in the presence of narrowband interference, while guaranteeing a BER below a predefined threshold. The effect of imperfect channel estimation on the algorithm's performance is also studied.
- bit error rate
- channel estimation
Mohamed, E. B., Marey, M., Dobre, O. A., & Baddour, K. E. (2012). Adaptive Bit Allocation for OFDM Cognitive Radio Systems with Imperfect Channel Estimation. 2012 IEEE Radio and Wireless Symposium. https://doi.org/10.1109/RWS.2012.6175359