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Method for filtering mobile radiotelephone signal and corresponding mobile radiotelephone receiver

A mobile wireless and receiver technology, applied in the field of mobile wireless receivers, can solve the problem that the specification of the receiving filter cannot be determined.

Inactive Publication Date: 2004-04-28
SIEMENS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unable to specify receive filter specifications such that it is optimal for both cases described

Method used

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  • Method for filtering mobile radiotelephone signal and corresponding mobile radiotelephone receiver
  • Method for filtering mobile radiotelephone signal and corresponding mobile radiotelephone receiver
  • Method for filtering mobile radiotelephone signal and corresponding mobile radiotelephone receiver

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Embodiment Construction

[0016] The structure of the mobile radio transmitter 1 and the mobile radio receiver 8 is schematically shown in FIG. 1 . The transmitter 1 includes a speech coder 2, which converts the analog speech signal to be transmitted into a digital bit stream, which is then input to a channel coder 3. The channel encoder 3 inserts additional redundant bits or information into the original useful bits according to a certain channel coding method, and said redundant bits or information can be analyzed at the receiving side in order to detect transmission errors. The output data of the channel coder 3 are fed to an interleaver 4, which reorders them temporally in order to thereby obtain a quasi-memoryless channel. A burst assembler 5 is connected behind the interleaver 4 for inserting the data to be transmitted into the frame structure, and then inputting it into the modulator 6 in the form of bursts, ie physical channels. The modulator 6 modulates the information to be transmitted into ...

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Abstract

The received mobile radiotelephone signal is analyzed in a mobile radiotelephone receiver ( 8 ) for the presence of adjacent channel interference and is only filtered if adjacent channel interference is determined, in order to suppress the same. The selectively filtered mobile radiotelephone signal is then conveyed, e.g. to an equalizer ( 12 ) for further processing.

Description

technical field [0001] The invention relates to a method of filtering received mobile radio signals and to a corresponding mobile radio receiver. Background technique [0002] Mobile radio systems are usually structured cellularly in order to cover large spatial areas with limited frequency bandwidth. Such as figure 2 As shown, such a cellular mobile radio system comprises a plurality of radio cells 17, each of which is assigned an own mobile radio channel. Within a radio cell no mobile radio channels of adjacent radio cells are used. However, due to the limited attenuation of the radio field in such mobile radio systems, interference or interference can occur in each radio cell 17 in particular by mobile radio channels of directly adjacent radio cells. This mainly concerns the border area between two adjacent radio cells 17 . This interference is called adjacent channel interference. The signal-to-noise ratio of the adjacent channel, ie the ratio of the signal power of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/10
CPCH04B1/1036
Inventor J·梅耶尔F·冯伯根N·汉特克
Owner SIEMENS AG