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Method and system for sending sequence of pilot freqency in system of multiple antenna and carriers

A multi-carrier system, pilot sequence technology, applied in diversity/multi-antenna system, transmission system, space transmit diversity and other directions, can solve the problem that the channel estimation accuracy cannot be guaranteed and needs to be further developed.

Inactive Publication Date: 2007-02-21
HUAWEI TECH CO LTD +1
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Problems solved by technology

When it is applied in real systems with guard bands, such as in environments with low SNR or high vehicle speeds, the accuracy of channel estimation cannot be guaranteed
[0007] The non-uniformly distributed pilot symbol sequence will increase the lower bound of the minimum pilot overhead, and it takes a lot of calculations to solve the pilot power distribution through the gradient iterative algorithm. At the same time, how to search for the optimal pilot carrier still needs further research

Method used

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  • Method and system for sending sequence of pilot freqency in system of multiple antenna and carriers
  • Method and system for sending sequence of pilot freqency in system of multiple antenna and carriers
  • Method and system for sending sequence of pilot freqency in system of multiple antenna and carriers

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Embodiment Construction

[0033] In order to make the objectives, technical solutions and advantages of the present invention more clearly expressed, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] First, the algorithm of the present invention will be described in detail:

[0035] First declare: Represents the pseudo-inverse of matrix A; A H Represents the conjugate transpose of matrix A; A * Represents the conjugate of matrix A; tr(A) represents the trace of matrix A; ‖A‖ F Represents the Frobenius norm of matrix A; min function represents the minimum value;

[0036] Assuming that the total number of transmitting antennas in a multi-antenna multi-carrier system is N t , The number of channel multipath is L, the total number of carriers in the system is N, the number of pilot carriers is M, and P is the total power allocated to the pilot sequence. The principle of the pilot sequence according to the present inve...

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Abstract

The method comprises: determining the pilot frequency carrier numbers M and grouping the pilot frequency carrier; M is not less than the product of all transmitting antenna numbers and multi path numbers, and is even times of all transmitting antenna numbers; the pilot frequency carrier numbers in each group is two times of all transmitting antenna numbers; the pilot frequency carrier in each group is distributed in equal interval; all transmitting antenna transmits pilot frequency sequence on same transmitting symbol and pilot frequency; wherein, the pilot frequency sequences of different transmitting antenna are distributed in equipower and have phase quadrature each other. The invention also reveals pilot frequency transmitting device and receive thereof.

Description

Technical field [0001] The present invention relates to the field of multi-antenna multi-carrier technology, and more specifically, the present invention relates to a method and system for transmitting pilot sequences in a multi-antenna multi-carrier system. Background technique [0002] The future development trend of mobile communication services is high-quality multimedia services, and the requirement for cell throughput will be increased to 100 Mbps to 1 Gbps. The industry expects that such a high-speed service can be realized between 2012 and 2015, but what contradicts the rapid increase in service speed is that spectrum resources are limited. In order to achieve high-speed information transmission on limited spectrum resources, a feasible way is to develop new air interface technologies with higher spectrum utilization. Multiple-input multiple-output (MIMO) technology (ie, multiple antenna technology) can greatly improve the spectrum efficiency, thereby increasing the capac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/02H04B7/04H04B1/76
Inventor 张建华周雯张平王吉滨李杰
Owner HUAWEI TECH CO LTD
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