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Vectorization achieving method and device of LTE system resource mapping

A technology of resource mapping and system resources, which is applied in the branch office to provide special service devices, transmission systems, digital transmission systems, etc., can solve problems such as low computing efficiency and inability to efficiently parallel map, achieve fast computing speed, wide application range, The effect of improving usage efficiency

Active Publication Date: 2014-07-30
上海思朗科技有限公司
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  • Application Information

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Problems solved by technology

This leads to a large number of conditional judgment operations in resource mapping, which cannot efficiently perform parallel mapping, and the operation efficiency is low

Method used

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  • Vectorization achieving method and device of LTE system resource mapping
  • Vectorization achieving method and device of LTE system resource mapping
  • Vectorization achieving method and device of LTE system resource mapping

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Embodiment 1

[0068] This embodiment mainly introduces how to implement vectorized mapping for OFDM symbols without reference signals in the present invention. Assume that the bandwidth is 10MHz, and the resource block RB allocated to the user is set to 1 at the corresponding position of the pointer bitmap, since the OFDM symbol does not contain reference signals, that is, all 12 consecutive subcarriers in one resource block RB need to be mapped, so that A series of operations such as judging whether the corresponding position of the resource mapping identification table RscTableFlag has been marked by other signals is omitted, and the data can be directly read from the memory, and then mapped to the corresponding position of the resource mapping table RscTable. Its process is as follows image 3 As shown, from the point of view of instructions, only a simple Load and Store operation can be completed.

[0069] like this Figure 4 As shown, the embodiment of the present invention provides ...

Embodiment 2

[0074] This embodiment mainly introduces how to implement vectorized mapping for OFDM symbols with reference signals in the present invention. Also assume that the bandwidth is 10MHz, and the reference signal is only CRS. In the case of a normal CP, its resource mapping structure is as follows figure 1 As shown, in a subframe, it is divided into 14 OFDM symbols horizontally and 600 subcarriers vertically, where the 1st, 5th, 8th, and 12th OFDM symbols (in the case of single antenna or 2 antennas) or in the first, 2, 5, 8, 9, 12 OFDM symbols (in the case of 4 antennas) contain CRS reference signals, and every 12 subcarriers contain 2 (in the case of single antenna) or 4 (in the case of 2 or 4 antennas) ) CRS reference signal, and the number in the OFDM symbol is fixed.

[0075] Such as Figure 5 As shown, the embodiment of the present invention provides a vectorized resource mapping method in which a reference signal exists in a current OFDM symbol. The method comprises the ...

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Abstract

The invention provides a vectorization achieving method and device of LTE system resource mapping. The device comprises a multi-granularity parallel storage, a data-caching device, a coefficient generating device and a vector broadcast combination device. According to the vectorization achieving method and device, a DSP chip which can be configured in a programmable mode is adopted, and the efficient vectorization resource mapping algorithm is combined to achieve an LTE / LTE-A resource mapping scheme. As for a downlink channel, according to different mapping time domain positions of the downlink sharing channel and a control channel, resource mapping is divided into control domain mapping and data domain mapping by taking a CFI as the dividing line, optimizing is performed on mapping of PDSCH channel signals in a data domain, and the vectorization achieving method and device have the advantages of being high in arithmetic speed, high in parallel granularity and small in memory access frequency.

Description

technical field [0001] The present invention relates to the field of communications, in particular to a vector processor-based resource mapping vectorization implementation method and device in LTE / LTE-A. Background technique [0002] In the 3GPP Long Term Evolution (LTE) and Long-Term Evolution Advanced (LTE-A for short) standards, resource mapping is used to map the MIMO-processed signal into a flexible frame structure In the two-dimensional time-frequency resource block with configuration (FDD / TDD) and variable system bandwidth, the multiple access method based on OFDM technology is used for signal transmission at the same time, so as to achieve peak rate, significantly improve spectrum utilization, and wider network spectrum Features such as higher capacity, lower transmission delay, and stronger flexibility make LTE / LTE-A more suitable for the needs of today's mobile Internet services. [0003] figure 1 It is a schematic diagram of the physical resource grid of the LT...

Claims

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Application Information

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IPC IPC(8): H04L5/00H04L12/18
Inventor 郭晓龙王晓琴吴军宁郭璟王伟康林啸赵旭莹张森
Owner 上海思朗科技有限公司
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