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Pilot signal transmission for an orthogonal frequency division wireless communication system

A technology of wireless communication equipment and pilot symbols, which is applied in the field of pilot information transmission and can solve problems such as the reduction of effective transmission data rate

Active Publication Date: 2013-06-05
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of pilot symbols causes a reduction in the achievable effective transmission data rate

Method used

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  • Pilot signal transmission for an orthogonal frequency division wireless communication system
  • Pilot signal transmission for an orthogonal frequency division wireless communication system
  • Pilot signal transmission for an orthogonal frequency division wireless communication system

Examples

Experimental program
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Embodiment Construction

[0024] refer to figure 1 , which shows a multiple access wireless communication system according to an embodiment. Base station 100 includes multiple antenna groups 102, 104, and 106 each including one or more antennas. exist figure 1 In , only one antenna is shown for each antenna group 102, 104 and 106, however, each antenna group corresponding to a sector of the base station 100 may employ multiple antennas. Mobile station 108 communicates with antenna 104 , where antenna 104 transmits information to mobile station 108 on forward link 114 and receives information from mobile station 108 on reverse link 112 . Mobile station 110 communicates with antenna 106 , where antenna 106 transmits information to mobile station 110 on forward link 118 and receives information from mobile station 110 on reverse link 116 .

[0025] Each group of antennas 102, 104, and 106 and / or the area in which the antennas communicate is often referred to as a sector of the base station. In this em...

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Abstract

Transmission patterns for pilot symbols transmitted from a mobile station or base station are provided. The pattern allows for improved receipt of the pilot symbols transmitted. In addition, schemes for improving the ability to multiplex pilot symbols without interference and / or biasing from different mobile stations over the same frequencies and in the same time slots. These pilot patterns are applied to Frequency Hopping OFDMA transmissions.

Description

technical field [0001] This document generally relates to wireless communication, and in particular to pilot information transmission in orthogonal frequency division wireless communication systems. Background technique [0002] Orthogonal Frequency Division Multiple Access (OFDMA) systems utilize Orthogonal Frequency Division Multiplexing (OFDM). OFDM is a multi-carrier modulation technique that divides the entire system bandwidth into multiple (N) Orthogonal Frequency Modulated sub-carriers. These subcarriers may also be referred to as subcarriers (tones), frequency bins (bins), and frequency channels. Each subcarrier can be modulated with data. Up to N modulation symbols may be sent on a total of N subcarriers in each OFDM symbol period. These modulated symbols can be converted to the time domain by an N-point Fast Fourier Transform (IFFT) to generate a symbol of N time-domain chips or samples. [0003] In a frequency hopping communication system, data is transmitted ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26H04B1/713
CPCH04L5/0062H04L27/261H04L5/023H04L5/0007H04L5/0051H04L5/0039H04L27/2628H04L27/2613H04L5/0083
Inventor A·戈罗霍夫A·F·纳吉布A·苏蒂翁D·A·戈雷T·纪
Owner QUALCOMM INC