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Large-scale MIMO transmission method and apparatus

A multi-antenna transmission and one-to-one correspondence technology, which is applied in the field of wireless communication and multi-antenna transmission, can solve the problem of low transmission power of a single antenna and achieve the effect of improving the receiving performance

Active Publication Date: 2017-12-29
SHANGHAI LANGBO COMM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In large-scale MIMO, the transmission power of a single antenna is generally low, so the coverage of broadcast signals is a problem that needs to be solved

Method used

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  • Large-scale MIMO transmission method and apparatus
  • Large-scale MIMO transmission method and apparatus
  • Large-scale MIMO transmission method and apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0148] Embodiment 1 illustrates the flow chart of wireless transmission, as attached figure 1 shown. attached figure 1 In , the base station N1 is the serving cell maintenance base station of the UE U2. attached figure 1 , the steps in box F1, box F2 and box F3 are optional.

[0149]For N1, send K1 first-type wireless signals in step S101; send K2 second-type wireless signals in step S102; receive the third wireless signal in step S103; determine the target signal according to T2 in step S11 The T1 first vectors, the T2 target signals are respectively sent by T2 terminals, the UE U2 is one of the T2 terminals, and the third wireless signal is one of the T2 target signals . The T2 is a positive integer, and one target signal is used to determine T second-type RS resources in one second-type radio signal; in step S12, a fourth radio signal is sent.

[0150] For U2, receive K1 first-type wireless signals in step S201; determine a fourth vector according to the target first-...

Embodiment 2

[0159] Embodiment 2 illustrates the schematic diagram of the antenna structure, as attached figure 2 shown. attached figure 2 In this example, the communication node is equipped with G antenna groups, and the G antenna groups correspond to G RF (Radio Frequency, radio frequency) Chains (chains) respectively. One antenna group includes V antennas, G is a positive integer, and V is a positive integer. For 1≤g≤G, the antennas in antenna group #g include the attached figure 2 In {Ant g_1,Ant g_2,...,Ant g_V}, the antenna {Ant g_1,Ant g_2,...,Ant g_V} passes the beamforming vector [a g,1 a g,2 …a g,V ] for analog beamforming.

[0160] As a sub-embodiment 1 of Embodiment 2, the communication node is a base station, and figure 2 x in 1 ,...x Q is the useful signal to be sent, and the useful signal is sent after undergoing digital beamforming and analog beamforming. The baseband processor is used for the x 1 ,...x Q perform digital beamforming, the [a g,1 a g,2 …a ...

Embodiment 3

[0175]Embodiment 3 illustrates a schematic diagram of resource mapping of RS ports in the first type of wireless signal and the second type of wireless signal, as shown in the attached image 3 shown. attached image 3 In , the slash marks the time-frequency resource occupied by the first type of wireless signal in one OFDM symbol, and the cross line marks the time-frequency resource occupied by one RS port of the second type of wireless signal in one OFDM symbol resources, the i is a positive integer.

[0176] As a sub-embodiment 1 of Embodiment 3, any RU (Resource Unit, resource unit) in the one OFDM symbol is used by one of {the first type of wireless signal, the second type of wireless signal} occupy. The RU occupies the bandwidth of one subcarrier in the frequency domain, and occupies the duration of one OFDM symbol in the time domain.

[0177] As a sub-embodiment 2 of Embodiment 3, the one OFDM symbol can only be occupied by one wireless signal of the first type, and...

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Abstract

The invention provides a large-scale MIMO transmission method and apparatus. The method comprises the following steps: UE firstly receives K1 first type wireless signals, then receives K2 second type wireless signals and finally sends a third wireless signal. The first type wireless signals comprise at least one of a synchronous signal, a broadcast signal and first type RS resources, and the second type wireless signals comprise L second type RS resources. The third wireless signal is used for determining T second type RS resources in the target second type wireless signal. The K2 second type wireless signals and the K1 first type wireless signals correspond to one another in a one-to-one manner. The K2 second type wireless signals are within the K1 first type wireless signals. By adoption of the large-scale MIMO transmission method and apparatus, the gain of the beamforming is improved, the signalling redundancy is reduced, and the transmission efficiency is improved.

Description

technical field [0001] The present invention relates to a method and device for multi-antenna transmission in the technical field of mobile communication, and in particular to a wireless communication solution in a scenario where a network side device deploys a large number of antennas. Background technique [0002] Massive MIMO has become a research hotspot in the next generation of mobile communications. In large-scale MIMO, the transmission power of a single antenna is generally low, so the coverage of broadcast signals is a problem that needs to be solved. [0003] 3GPP (3rd Generation Partner Project, third generation partnership project) RAN (RadioAccess Network, wireless access network) WG (Working Group, working group) #74bis meeting proposed a beam sweeping (Beam Sweeping) scheme, namely The base station transmits broadcast signals multiple times in a TDM (Timing Division Multiplexing, time division multiplexing) manner, and transmits beams in different directions ...

Claims

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Application Information

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IPC IPC(8): H04B7/04H04B7/06H04L1/00
CPCH04B7/0413H04B7/0617H04B7/0632H04L1/0026H04L5/0048H04L5/0094
Inventor 张晓博
Owner SHANGHAI LANGBO COMM TECH CO LTD
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