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Receiver, a communication system and a receiving method

A technology for communication systems and receivers, applied in transmitter/receiver shaping networks, transmission systems, multiplexing communications, etc., can solve the problem that signal detection characteristics cannot be improved, and achieve improved data signal detection characteristics Effect

Inactive Publication Date: 2005-08-31
NTT DOCOMO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the data signal detection characteristics of the second stage and after can be improved, but in the data signal detection of the first stage, there is interference caused by the pilot signal in the received signal, so there are cases where the signal detection characteristics cannot be improved question

Method used

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  • Receiver, a communication system and a receiving method
  • Receiver, a communication system and a receiving method
  • Receiver, a communication system and a receiving method

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Embodiment Construction

[0027] Next, embodiments of the present invention will be described with reference to the drawings.

[0028] In all the drawings for explaining the embodiments, elements having the same functions are denoted by the same reference numerals, and redundant descriptions are omitted.

[0029] A communication system according to an embodiment of the present invention includes a transmitter and receiver 100 .

[0030] The transmitter transmits to the receiver 100 signals including data signals and non-data signals. The receiver 100 detects a data signal based on a signal transmitted from a transmitter.

[0031] Next, refer to figure 2 The configuration of receiver 100 in the communication system according to the first embodiment of the present invention will be described.

[0032] The receiver 100 in the communication system according to the embodiment of the present invention removes received signal replicas of non-data signals (such as pilot signals) included in the received si...

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Abstract

The objective of the invention is to provide a receiver, communication system and reception method in which data signal detection characteristics are impoved. A receiver comprises: a channel estimation means for performing channel estimation; an interference signal removal means which uses an estimated channel estimation value to generate a reception signal replica of a non-data signal contained in a reception signal and removes the reception signal replica of the non-data signal from the reception signal; and a data signal detection means which uses an output signal of the interference signal removal means to detect a data signal.

Description

technical field [0001] The present invention relates to a receiver, a communication system, and a receiving method for improving communication quality in signal transmission using code division multiple access. Background technique [0002] Today, Code Division Multiple Access (CDMA: Code Division Multiple Access) is used as a mobile communication method. In the CDMA method, data signals and non-data signals (such as pilot signals and other control signals) are multiplexed at the same time and frequency by spreading codes for transmission. [0003] In this CDMA, the spreading codes used for each signal are orthogonal to each other, so in a channel without multipath, data signals can be detected without interference in the receiver. [0004] However, in a multipath channel, due to the destruction of the orthogonality between spreading codes, inter-symbol interference of data signals and interference caused by non-data signals also appear, and the receiving quality is greatly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J13/00H04B1/10H04B1/7107H04J99/00
CPCH04B1/7107H04B2201/70701A47C27/00A47G9/10
Inventor 阿部哲士
Owner NTT DOCOMO INC