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Reception method and reception device

A receiving method and receiver technology, applied in the field of demodulation processing, can solve problems such as multipath interference and symbol interference, and achieve the effect of good receiving characteristics

Inactive Publication Date: 2009-09-09
NEC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in an environment where high-speed data transmission is performed using a single carrier (hereinafter simply referred to as "SC"), there arises a problem of multipath interference, that is, interference between symbols received through multipath occurs.

Method used

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  • Reception method and reception device

Examples

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Embodiment Construction

[0044] Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings. figure 1 is a configuration diagram showing a first exemplary embodiment of a receiver according to the present invention. The receiver 1001 of the present exemplary embodiment is a radio base station connected to a plurality of user terminals (not shown), which communicate with each other by radio communication using SC-FDMA.

[0045] Such as figure 1 As shown, the receiver 1001 includes a CP (cyclic prefix) removal unit 1, a DFT unit 2, a demapping unit 3, and frequency conversion units 4-1 to 4-K (K is an integer corresponding to the number of users and not less than 1) , demodulation sections 5-1 to 5-K and frequency offset correction signal generation sections 17-1 to 17-K.

[0046] image 3 An example of a radio frame format used for equalization processing in the frequency domain is shown. The radio frame signal 300 includes a plurality of pil...

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Abstract

To provide a reception method and a reception device in which a base station can correct a frequency offset contained in a reception signal and realize an excellent reception characteristic by using simple reception mechanism of a frequency region in a radio system of the frequency division multiplex type. [MEANS FOR SOLVING PROBLEMS] A base station includes; a DFT unit which converts reception signals from a plurality of mobile stations communicating by radio communication of the frequency division multiplex method all at once into signals of a frequency region; a demapping unit which recognizes user signals corresponding to respective mobile stations by using subcarriers associated with respective mobile stations from the signals of the converted frequency region; a corrected signal generation unit which creates a correction signal for correcting a user signal frequency offset for each of the user signals; a frequency conversion unit which corrects the frequency offset of the user signal by the correction signal; and a demodulation unit which demodulates each of the corrected user signals.

Description

technical field [0001] The present invention relates to a receiving method and a receiver in a radio system applying a frequency division multiplexing method such as SC-FDMA (Single-Carrier Frequency Division Multiple Access) or OFDMA (Inter-Frequency Division Multiple Access), and more particularly to a receiver for receiving Signal demodulation processing. Background technique [0002] In an uplink radio access system for next-generation mobile communication, high transmission power efficiency of a mobile station is considered to be important in order to expand a communication area. For such systems, SC-FDMA with relatively low PARP (Peak-to-Average Power Ratio) is considered to be advantageous. Realization of high-speed data transmission is highly demanded in next-generation mobile communications. However, in an environment where high-speed data transmission is performed using a single carrier (hereinafter simply referred to as "SC"), a problem of multipath interference...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J11/00H04J1/00
CPCH04L27/265H04L27/2657H04L27/26526H04J11/0036H04L27/2691
Inventor 吉田尚正木全昌幸
Owner NEC CORP
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