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A receiver for wireless communication system

A wireless signal receiving and wireless signal technology, applied in the transmission system, discontinuous tuning with a separate pre-tuning circuit, electrical components, etc., can solve the problems of user signal distortion and large out-of-band interference power

Inactive Publication Date: 2007-01-03
KONINKLIJKE PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

When the band-pass sampling receiver performs band-pass sampling on the analog RF signal received from the antenna, the signal outside the frequency band where the desired user signal is located (that is, out-of-band interference) will be folded into the frequency band where the user signal is located, causing the user signal distortion
Because the said out-of-band interference power is usually very large, the distortion caused to the user signal is often more than the allowable level

Method used

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  • A receiver for wireless communication system
  • A receiver for wireless communication system
  • A receiver for wireless communication system

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Embodiment Construction

[0028] In order to meet the requirement of the band-pass sampling receiver on the gating performance of the radio frequency filter, a method provided by an embodiment of the present invention is to cascade N radio frequency filters with the same gating performance. Assume that the total attenuation of out-of-band interference on the input signal of the sampler is A 0 , then as long as each RF filter can attenuate A 0 / N interference, the total out-of-band interference attenuation of N such RF filters cascaded can reach A 0 .

[0029] Figure 4 It is a bandpass sampling receiver using multiple cascaded radio frequency filters of the present invention. As shown in the figure, the radio frequency filtering and amplifying unit 310 of the bandpass sampling receiver is composed of a radio frequency processing chain 311 , and the radio frequency processing chain 311 includes cascaded radio frequency filters 11 , 13 , 15 and a low noise amplifier 16 . When the band-pass sampling r...

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Abstract

An RF filtering and amplifying apparatus is proposed, comprising: a plurality of RF filters, connected with each other in a manner of cascade, for filtering the received radio signal level by level; a LNA (low noise amplifier), for amplifying the filtered signal to output an amplified and filtered signal. The RF filtering and amplifying apparatus in the present invention can not only meet the requirement for the selectivity of the filters, but also achieve desirable in-band distortion and insertion loss meanwhile.

Description

technical field [0001] The invention relates to a band-pass sampling receiver used in a wireless communication system, in particular to a band-pass sampling receiver whose radio frequency circuit part is composed of a plurality of cascaded radio frequency filters. technical background [0002] In the field of wireless communication, the receiver plays a very important role, because it receives the radio frequency signal from the wireless space through the antenna, and converts it into a baseband digital signal with a center frequency at zero frequency, so that it can be further processed by the baseband part. A desired user signal with a required bit error rate is recovered. [0003] figure 1 A conventional widely used superheterodyne receiver is shown. like figure 1 As shown, the analog radio frequency signal received by the antenna unit 10 is sent to the radio frequency filter 20 . After the radio frequency filter 20 receives the analog radio frequency signal from the ...

Claims

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Application Information

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IPC IPC(8): H04B1/16H03J5/24
Inventor 钱学诚
Owner KONINKLIJKE PHILIPS ELECTRONICS NV
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