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LTE uplink frequency domain LS channel estimation fixed-point realization method

A technology of channel estimation and implementation method, which is applied in the direction of multi-frequency code system, etc., and can solve the problem that division operation affects the processing efficiency of fixed-point operation platform, etc.

Active Publication Date: 2014-05-28
BEIJING STARPOINT TECH COMPANY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The technical problem to be solved by the present invention is that a large number of division operations in the existing channel estimation method affect the processing efficiency of the fixed-point computing platform

Method used

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  • LTE uplink frequency domain LS channel estimation fixed-point realization method
  • LTE uplink frequency domain LS channel estimation fixed-point realization method
  • LTE uplink frequency domain LS channel estimation fixed-point realization method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0097] In this embodiment, after the receiver runs, the first channel estimation operation is performed or the power corresponding to a certain channel estimation in the channel estimation matrix is ​​in [P min , P max ], the channel estimation preprocessing table needs to be regenerated. The receiver is a signed fixed-point implementation platform, and its parameters are: the operation word length is 32 bits, and the calibration is Q 0 Format. Then the fixed-point implementation platform can represent the largest positive integer λ=2 31 -1.

[0098] The received data is the data of 1 resource grid (RB), and the H calculated from the 12-bit pilot data i They are:

[0099] serial number i

1

2

3

4

5

6

H i

229+284j

306+228j

353+126j

372+23j

377-71j

328-159j

serial number i

7

8

9

10

11

12

H i

284-237j

227-297j

139-350j

50-385j

-56-378j

-158-332j

...

Embodiment 2

[0108] On the basis of Embodiment 1, in this embodiment, the receiver performs the qth channel estimation operation, q>1, and the powers corresponding to all channel estimates in the channel estimation matrix are in [P min , P max ] range.

[0109] The received data is the data of 1 resource grid (RB), and the H calculated from the 12-bit pilot data i They are:

[0110] serial number i

1

2

3

4

5

6

H i

229+284j

306+228j

353+126j

372+23j

377-71j

328-159j

serial number i

7

8

9

10

11

12

H i

284-237j

227-297j

139-350j

50-385j

-56-378j

-158-332j

[0111] According to the P obtained in Example 1 min =129293,P max =154297,P j and its corresponding M j for:

[0112] j

1

2

3

4

5

6

7

8

Pj

129293

130074

130856

131637

132419

133200

133981

134763

Mj

16609

1651...

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Abstract

The invention disclose an LTE uplink frequency domain least-square (LS) channel estimation fixed-point realization method. The method comprises the following steps: S1, carrying out channel estimation on pilot frequency data in a received signal so as to obtain an initial channel response I0; S2, according to the initial channel response I0, generating a channel estimation pre-processing table; and S3, carrying out pre processing on the initial channel response I0 according to the channel estimation pre-processing table so as to obtain a channel response I.

Description

technical field [0001] The invention relates to the field of mobile communication, in particular to a fixed-point implementation method for LTE uplink frequency domain LS channel estimation. Background technique [0002] In the uplink of the LTE wireless communication system, the received signal is distorted in phase and amplitude due to the influence of channel interference on the transmitted signal. The channel interference is mainly caused by multipath fading and Doppler frequency in the wireless channel. shift. Therefore, the receiver needs to eliminate channel interference through channel equalization technology. [0003] The traditional LTE uplink frequency domain channel estimation fixed-point implementation method, such as figure 1 As shown, the method includes: [0004] After the cyclic prefix (CP) is removed from the received data, it is transformed into the frequency domain by fast Fourier transform (FFT), and the frequency domain data Y of the pilot is extract...

Claims

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Application Information

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IPC IPC(8): H04L27/26
Inventor 张智袁伟唐恬崔清张治姜军
Owner BEIJING STARPOINT TECH COMPANY
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