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Radio receiver

一种无线接收机、本机的技术，应用在阻抗网络、数字技术网络、电气元件等方向，能够解决降低采样速率、处理的负担大等问题，达到提高接收特性的效果

Inactive Publication Date: 2008-12-10
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] For the discrete-time signal obtained here, although the local frequency f LO Equivalent sampling rate, but if used directly, the burden on the post-stage processing will be greater
Therefore, in the decimation processing unit 32, by performing the extraction of the sampled value, that is, performing thinning, the sampling rate is reduced

Method used

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Embodiment approach 1

[0032] In this embodiment, a structure and an example of operation will be described. That is, in a receiving system that performs discrete-time processing, information on the local frequency is used, and based on a sampling rate that varies according to the frequency of the receiving channel, the digital receiving process The configuration and operation example when the frequency response characteristic of the filter processing in the unit is corrected.

[0033] FIG. 2 is a block diagram showing the configuration of wireless receiver 100 according to this embodiment. The wireless receiver 100 receives the carrier frequency f RF The transmitted digitally modulated signal is subjected to predetermined demodulation processing, and the obtained received bit data is output. This wireless receiver 100 is made up of following unit: Antenna 110, low noise amplification unit (LNA) 120, discrete time property frequency conversion processing unit 130, local frequency oscillation unit 1...

Embodiment approach 2

[0076] In this embodiment, a configuration and an example of operation will be described in which a filter effect is obtained when frequency conversion is performed by discrete-time processing, and the frequency response characteristic due to the filter effect is considered to be based on fluctuations in the frequency of the receiving channel. The information on the oscillation frequency is a configuration and an example of operation of performing correction filter processing based on the above-mentioned variation in the frequency response characteristic in the digital reception processing unit.

[0077] FIG. 4 is a diagram showing the configuration of wireless receiver 200 according to the present embodiment. In the wireless receiver 200, the same reference numerals are used to denote the same configuration and operating parts as those of the wireless receiver 100 shown in FIG. 2, and their descriptions are omitted. In the wireless receiver 200, the parts that differ in struc...

Embodiment approach 3

[0111] In this embodiment, a configuration and an example of operation in a case where the reception channel frequency band is further widened in the configuration of the radio receiver described as an example in Embodiment 2 will be described.

[0112] FIG. 6 is a diagram showing the configuration of wireless receiver 300 according to this embodiment. In the radio receiver 300, the same reference numerals are assigned to the same configuration and operating parts as those of the radio receiver 200 shown in FIG. 4, and their descriptions are omitted. In the wireless receiver 300, the parts that differ in structure and operation from the wireless receiver 200 are: the extraction processing unit 311 in the discrete-time frequency conversion processing unit 310, and the frequency response characteristic correction processing unit in the digital reception processing unit 320 321, and the control unit 330.

[0113] In addition, in this embodiment, it is assumed that a reception ch...

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PUM

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Abstract

A radio receiver including a reception processing system that uses a discrete-time frequency conversion to acquire a signal having a sampling rate corresponding to a local frequency, wherein the reception characteristic is improved when the reception processing system is applied to a system having a wide reception channel band. The radio receiver (100) comprises a discrete-time frequency converting part (130) that uses a local frequency signal to sample a received signal in a discrete-time manner, thereby performing a frequency conversion and a thinning process to output a discrete-time analog signal of a sampling rate in accordance with the local frequency; an A / D converting part (150) that quantizes the discrete-time analog signal to a digital value to output a received digital signal; a channel selection filtering part (161) that uses a tap coefficient value to perform a digital filtering process of the received digital signal; and a frequency response characteristic correcting part (162) that generates the tap coefficient in accordance with the sampling rate.

Description

technical field [0001] The invention relates to a radio receiver which performs discrete-time sampling of high-frequency signals and discrete-time processing of subsequent stages. Background technique [0002] In order to realize the small and low energy consumption of the wireless receiver and the integration of the analog signal processing unit and the digital signal processing unit, it is disclosed that the high-frequency signal is directly sampled in a discrete time, and the structure of the subsequent stage is processed in a discrete time (such as non- Patent Document 1). Accordingly, it is also expected to reduce the design complexity in conventional continuous-time simulation processing. [0003] Hereinafter, an example of the configuration and operation of a conventional radio receiver using discrete-time processing will be described with reference to FIG. 1 . [0004] The analog RF signal received by the antenna 10 is amplified in a low noise amplification unit (L...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/26H03D7/00H03H17/02H03H17/06H04B1/10H04B1/16
CPCH04B1/0007H04B1/28
Inventor 安倍克明松冈昭彦宫野谦太郎
Owner PANASONIC CORP
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