Abstract
In recent years, there has been considerable interest in the theory and design of filter bank transceivers due to their superior frequency response. In many applications, it is desired to have transceivers that can support multiple services with different incoming data rates and different quality-of-service requirements. To meet these requirements, we can either do resource allocation or design transceivers with a nonuniform bandwidth partition. In this paper, we propose a method for the design of nonuniform filter bank transceivers for frequency selective channels. Both frequency response and signal-to-interference ratio (SIR) can be incorporated in the transceiver design. Moreover, the technique can be extended to the case of nonuniform filter bank transceivers with rational sampling factors. Simulation results show that nonuniform filter bank transceivers with good filter responses as well as high SIR can be obtained by the proposed design method.
Highlights
The orthogonal frequency division multiplexing (OFDM) system has enjoyed great success in many wideband communication systems due to its ability to combat intersymbol interference (ISI) [1]
When the channel is a frequency selective channel, these filter bank transceivers suffer from severe ISI effect [7, 8], and post processing technique is needed at the receiver for channel equalization [4]
It has been demonstrated that filter bank transceivers with high signal-to-interference ratio (SIR) and good frequency responses can be obtained [10]
Summary
The orthogonal frequency division multiplexing (OFDM) system has enjoyed great success in many wideband communication systems due to its ability to combat intersymbol interference (ISI) [1]. It has been demonstrated that filter bank transceivers with high SIR and good frequency responses can be obtained [10]. The proposed algorithm was efficient and good results were achieved These nonuniform transceiver designs do not consider the channel effect. We consider the design of nonuniform transceiver for frequency selective channels Both the cases of integer and rational sampling factors are considered. Simulation results show that we can obtain nonuniform transceivers with very high SIR (around 50 dB) and good frequency response (stopband attenuation around 40 dB). The convolution of two sequences x(n) and y(n) is represented by x(n) ∗ y(n)
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