How Quadrature Bandpass Sampling can be used in GNSS Receivers
نویسنده
چکیده
This is a non-refereed presentation that examines the use of quadrature bandpass sampling (QBPS), reviewing several of the results recently presented in [1]. Like bandpass sampling (BPS), this technique allows signals with a high frequency carrier to be sampled at a rate not less than twice the signal bandwidth. The actual available frequencies for sampling are shown to many more than for bandpass sampling. There are three restrictions, none of which can be breached when selecting sampling frequencies for bandpass sampling. For quadrature bandpass sampling, one of these may be breached. Examples of multi-frequency GNSS receivers are used to show that not only can QBPS generally be sampled using a lower minimum frequency than for BPS, but at frequencies above the minimum, there are far more choices when using QBPS.
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