RF receiver

Abstract

An RF receiver (2) comprising: an RF signal processing unit (10) for receiving an RF signal (4), wherein the RF signal processing unit (10) comprises a dynamically reconfigurable RF filter (14) for filtering the RF signal (4); an analog-todigital converter (30) for converting the filtered RF signal (22) to a digital signal (32); and a digital signal processing unit (40) for processing the digital signal (32) to provide at least one channel (42); wherein the digital signal processing unit (40) is adapted to adjust a respective transfer function of at least one said channel (42) when the RF filter (14) is reconfigured, to at least partially compensate a change in the transfer function of the RF filter (14).

Description

technical field [0001] The present invention relates to RF receivers, and in particular but not exclusively to RF receivers having dynamically reconfigurable RF signal processing units. Background technique [0002] Communication systems that handle high data rates often require the use of multiple parallel receivers or a single wideband receiver. [0003] figure 1 A bank of single-channel receivers is shown, comprising a plurality of single-channel receivers for each respective channel to be simultaneously received. This approach results in high cost and high power consumption. [0004] Once the useful part of the spectrum occupies a moderate part of the entire input spectrum, it is different from the traditional method using multiple single-channel receivers ( figure 1 ) compared to using a single direct RF digitizing receiver ( figure 2 ) have been shown to be more efficient in terms of power and cost. [0005] figure 2 A direct RF digitizing receiver is shown, co...

AI Technical Summary

Problems solved by technology

[0007] Although this method is able to optimize the performance of the receiver under static conditions, it fails when the communication channel has dynamic characteristics

This is because the reconfiguration of the RSPU (and specifically the RF filter) causes a transient amplitude step that hampers the baseband demodulator and causes uncorrectable errors in transmission, especially for higher order modulations (e.g. 256QAM and above)

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