An Adaptive Broadband Channelization Scheme Using Nonuniform Subband Decomposition

作者：Zhao Yan^*; Luo Sheng en; Wan Jian

来源：6th International Conference on Wireless Communications, Networking and Mobile Computing (WICOM), 2010-09-23 To 2010-09-25.

DOI：10.1109/wicom.2010.5600710

• Channelization
• Broadband
• Subband filterbanks
• Polyphase decomposition

In modern broadband software defined radio systems, there usually exist several independent signals in the received intermediate frequency (IF) bandwidth. They have nonequal bandwidths and arbitrary band locations, which are unknown and time-variant. In order to efficiently channelize these signals, an adaptive channelization method is proposed based on complex-valued oversampled subband filterbanks. The IF signal is decomposed by uniform analysis filterbanks firstly. Then the signals' distribution is obtained according to the power estimations of every sub-signal. At last, the desired signals are extracted by merging the corresponding sub-signals using synthesis filterbanks. When the signals' distribution changes, the synthesis scheme is updated adaptively to channelize new signals without altering subband filterbanks. Polyphase decomposition are adopted to optimize the channelization method and reduce the computational complexity. Simulations are carried out to testify the reliability and efficiency of the proposed scheme.

• 出版日期2010
• 单位中国人民解放军信息工程大学