Journal article
Time-Frequency Channel Parameterization with Application to Multi-Mode Receivers
Publication Details
Authors: | Hunziker, T.; Ju, Z.; Dahlhaus, D. |
Publication year: | 2009 |
Journal: | IEICE Transactions on Communications |
Pages range : | 3717-3725 |
Volume number: | E92B |
Start page: | 3717 |
End page: | 3725 |
ISSN: | 0916-8516 |
eISSN: | 1745-1345 |
DOI-Link der Erstveröffentlichung: |
Abstract
There is a trend towards flexible radios which are able to cope with a range of wireless communication standards. For the integrated processing of widely different signals-including single-carrier, multi-carrier, and spread-spectrum signals-monolithic baseband receivers need universal formats for the signal representation and channel description. We consider a reconfigurable receiver architecture building on concepts from time-frequency (TF) signal analysis. The core elements are TF signal representations in form of a Gabor expansion along with a compatible parameterization of time-variant channels. While applicable to arbitrary signal types, the TF channel parameterization offers similar advantages as the frequency domain channel description employed by orthogonal frequency-division multiplexing receivers. The freedom in the choice of the underlying analysis window function and the scalability in time and frequency facilitate the handling of diverse signal types as well as the adaptation to radio channels with different delay and Doppler spreads. Optimized window shapes limit the inherent model error. as demonstrated using the example of direct-sequence spread-spectrum signaling.
There is a trend towards flexible radios which are able to cope with a range of wireless communication standards. For the integrated processing of widely different signals-including single-carrier, multi-carrier, and spread-spectrum signals-monolithic baseband receivers need universal formats for the signal representation and channel description. We consider a reconfigurable receiver architecture building on concepts from time-frequency (TF) signal analysis. The core elements are TF signal representations in form of a Gabor expansion along with a compatible parameterization of time-variant channels. While applicable to arbitrary signal types, the TF channel parameterization offers similar advantages as the frequency domain channel description employed by orthogonal frequency-division multiplexing receivers. The freedom in the choice of the underlying analysis window function and the scalability in time and frequency facilitate the handling of diverse signal types as well as the adaptation to radio channels with different delay and Doppler spreads. Optimized window shapes limit the inherent model error. as demonstrated using the example of direct-sequence spread-spectrum signaling.
