Low IF GMSK modem architecture with joint symbol timing recovery and frequency offset compensation

Yung Liang Huang*, Chia-Chi Huang

*Corresponding author for this work

Research output: Contribution to conferencePaperpeer-review

Abstract

This paper records our work in developing a GMSK modem with joint symbol timing recovery and frequency offset compensation capability. The received RF signal is first down converted to a low IF, and then converted to complex baseband by a digital complex sampler. This baseband signal is then frequency discriminated and passed through a digital filter which in fact performs a Fast Fourier Transform (FFT). In other words, we apply an FFT algorithm on the frequency discriminated baseband signal in order to estimate symbol timing error and frequency offset simultaneously. The frequency offset can be estimated from the DC component of the FFT and the symbol timing error can be estimated from the phase angle of the FFT at a specified frequency which is equal to an integral multiple of half the bit rate. These two estimated parameters are then used for symbol timing recovery and frequency offset compensation. The Bit Error Rate (BER) performance of our GMSK receiver architecture is assessed for an AWGN channel by computer simulation.

Original languageEnglish
Pages281-285
Number of pages5
DOIs
StatePublished - 18 Oct 1996
EventProceedings of the 1996 7th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC'96. Part 3 (of 3) - Taipei, Taiwan
Duration: 15 Oct 199618 Oct 1996

Conference

ConferenceProceedings of the 1996 7th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC'96. Part 3 (of 3)
CityTaipei, Taiwan
Period15/10/9618/10/96

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