Method for receiving a signal and receiver

A technology for receiving signals and receivers, which is applied in the field of receivers and can solve problems such as code delays and increased complexity

Inactive Publication Date: 2011-01-26
ASTRIUM GMBH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0028] - Increased complexity to compensate for the unavoidable code delay between the incoming RF signal and the locally generated binary PRN code

Method used

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  • Method for receiving a signal and receiver
  • Method for receiving a signal and receiver
  • Method for receiving a signal and receiver

Examples

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Embodiment Construction

[0094] The invention is illustrated below on the basis of examples.

[0095] Figure 5 The receiver architecture shown in has the capability of receiving I channel as well as Q channel. To receive the reference signal on the I channel, only the paths 502, 508, 510, 512, 518 have to be implemented.

[0096] Once the reference signal has been generated, it can be used to correlate the transmitter's signal. Thus, every receiver using the correlation function can use this scheme to receive GMSK signals.

[0097] The correlation function of the GMSK signal modulated by the PRN code is not as "sharp" as the corresponding BPSK (Binary Phase Keying (binary phase shift keying)) signal. For this reason, the correlation function has poor performance in multipath environments. A simple way to improve performance is to use a 2-bit quantized reference signal for filter CO.

[0098] To sharpen the correlation, the filter C0 (516 or 518) is quantized with 2 bits during sampling 512 or 51...

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PUM

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Abstract

A process for receiving a GMSK-modulated signal which, for simultaneously transmitting two services, has an in-phase signal with a pseudo-random code that differs from the quadrature signal. By means of a decomposition filter in a reference signal branch detects one service independently of the other during the correlating with the received signal.

Description

technical field [0001] The invention relates to a method for receiving phase-continuous signals and to a receiver. Background technique [0002] GMSK (Gaussian Minimum Shift Keying) is one of the most promising modulation methods for transmitting signals such as communication signals or navigation signals within a limited bandwidth without interfering with adjacent frequency bands one. [0003] The advantages of this modulation scheme over some other signals are: [0004] - Improved spectral efficiency compared to other keyed modulation methods [0005] -Constant envelope. Interference caused by the use of non-linear amplifiers is thereby limited. [0006] Currently, GMSK is mainly used in radio communication systems such as cellular GSM (Global System for Mobile Communication (Global System for Mobile Communication)). [0007] To date, no navigation signals use GMSK modulation. Therefore, no navigation receivers based on this modulation scheme exist to date. But the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/03
CPCH04L27/2017H04L27/2278H04J13/0022
Inventor O·巴尔巴赫J-J·弗洛克A·施米茨-佩弗
Owner ASTRIUM GMBH
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