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Equipment and method for generating pilot frequency sequence

A pilot sequence and equipment technology, which is applied to pilot signal allocation, multi-frequency code system, multiple use of transmission paths, etc. The effect of avoiding detection failure and avoiding effective energy loss

Active Publication Date: 2014-11-05
NEC (CHINA) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since the traditional pilot sequence does not contain subcarrier mapping information, when there is a large carrier frequency offset in the system, since the position of the pilot subcarrier at the receiving end is already different from the default pilot subcarrier position in the system, Therefore, the demodulation performance of the pilot sequence (based on the frequency domain filter) is greatly affected by the carrier frequency offset, which may even lead to the failure of demodulation

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  • Equipment and method for generating pilot frequency sequence
  • Equipment and method for generating pilot frequency sequence
  • Equipment and method for generating pilot frequency sequence

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Embodiment Construction

[0040] In the following, the principle and implementation of the present invention will become apparent by describing specific embodiments of the present invention in conjunction with the accompanying drawings. It should be noted that the present invention should not be limited to the specific examples described below. Also, descriptions of well-known elements are omitted for brevity.

[0041] In a specific embodiment below, the pilot sequence of the present invention is described with a single frequency network based on OFDM modulation. However, it should be understood that the present invention is not limited to OFDM-modulated single frequency networks. The present invention can also be applied to other wireless networks, such as wireless networks using orthogonal time division multiplexing modulation, and so on.

[0042] figure 1A single frequency network transceiver system based on OFDM modulation is shown according to an embodiment of the present invention. Such as f...

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Abstract

A device for generating a pilot sequence is provided. The device includes: a mapping information determining unit configured to determine periodic mapping information of the pilot sequence on subcarriers; and a pilot sequence generating unit configured to generate the pilot sequence by calculating phase information of the pilot sequence to be generated based on the periodic mapping information. A method and a device for estimating channel information are also provided.

Description

technical field [0001] The present invention relates to the field of wireless communication, in particular to a device and method for generating pilot sequences. Background technique [0002] In a single frequency network (SFN), multiple transmitters use the same time and frequency resources to transmit the same information to the same receiver. For example, single-frequency networks based on OFDM modulation are widely used in digital audio broadcasting (DAB) and land-based digital video broadcasting (DVB-T) systems. [0003] The pilot sequence placed orthogonally in the frequency domain is the most common orthogonal pilot placement method. Based on this pilot placement strategy, the receiver can use a set of frequency domain filters to effectively identify and demodulate pilot sequences sent by different transmitters. Besides frequency domain quadrature, other quadrature strategies, such as time domain quadrature, are often employed. [0004] In order to improve the reli...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26H04L25/02H04L25/03
CPCH04L5/0048H04L25/0226H04L5/00H04L27/2613
Inventor 张中山雷鸣
Owner NEC (CHINA) CO LTD