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A Spatial Modulation Transmission Method for Activating Indefinite Transmitting Antennas

A transmitting antenna and spatial modulation technology, applied in the field of communication anti-interference, can solve problems such as wasting space resources, achieve good performance gain, and improve spectrum efficiency

Active Publication Date: 2020-06-30
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in traditional SM and GSM, the number of active antennas per time slot is fixed, and there is still the problem of wasting space resources

Method used

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  • A Spatial Modulation Transmission Method for Activating Indefinite Transmitting Antennas
  • A Spatial Modulation Transmission Method for Activating Indefinite Transmitting Antennas
  • A Spatial Modulation Transmission Method for Activating Indefinite Transmitting Antennas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] In this example the spatial modulation system has N t = 4 transmit antennas, N r =4, the maximum number of active antennas per time slot is Nu=2;

[0026] Step 1: Determine the total number of antenna combinations No=10:

[0027]

[0028] Step 2: Select N=8 effective combinations. Using the combination priority discarding principle with a large number of active antennas, the combination is as follows

[0029]

[0030] Step 3: Determine the transfer rate. It can be known from step 2 that the number of bits used for transmitting antenna combinations is 3, and if the combination of activating one antenna adopts QPSK, the total number of transmitted bits is 5. Therefore, BPSK modulation can be used for the combination of activating 2 antennas.

[0031] Step 4: Perform power allocation and phase factor rotation. In this case, we adopt equal power distribution p1=p2=1. Since the combination of activating multiple antennas uses BPSK, the phase factor of π / 2 is used...

Embodiment 2

[0036] In this example the spatial modulation system has N t = 8 transmit antennas, N r =8, the maximum number of active antennas per time slot is Nu=2;

[0037] Step 1: Determine the total number of antenna combinations No=36. Where the size of set I1 is 8 and the size of set I2 is 28.

[0038] Step 2: Select N=32 valid combinations. According to the priority discarding principle with the largest number of activated antennas. The 4 combinations with the number of active antennas being 2 are discarded. Then the effective combination is Expressed as follows:

[0039]

[0040]

[0041] Step 3: From step 2, it can be seen that the number of bits used to transmit the combination of antennas is 5. If the combination of activating one antenna uses QPSK, the total number of bits transmitted is 7. Therefore, BPSK modulation can be used for the combination of activating 2 antennas .

[0042] Step 4: Perform power allocation and phase factor rotation. In this case, we ad...

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Abstract

The invention belongs to the technical field of communication anti-interference and particularly relates to an SM (spatial modulation) transmission method capable of activating indefinite transmitting antennas. For any transmitting antenna, the invention provides a novel antenna activation mapping criterion, that is, different numbers of antennas are activated through each time slot to transmit data, the requirement of sparse radio frequency of a transmitting terminal is met, and the system spectrum efficiency is further improved. Besides, a best power distribution scheme for the system is also provided to further improve the system performance, and the novel SM transmission scheme has excellent transmission performance than traditional SM on the premise that the antenna number and spectrum efficiency are the same.

Description

technical field [0001] The invention belongs to the technical field of communication anti-jamming, and in particular relates to a space modulation transmission method for activating an indeterminate transmitting antenna. Background technique [0002] The present invention relates to spatial modulation (Spatial Modulation, SM) technology, MIMO (Multiple Input Multiple Output, MIMO), power distribution and other technologies. [0003] Spatial modulation SM technology is a new MIMO transmission technology proposed in recent years, which can also be regarded as a new modulation technology that utilizes antenna resources. The basic principle of this technology is: by activating different transmit antennas, the index value of the activated antenna is used to modulate the bit information. Only one antenna is activated for each time slot of spatial modulation, so it can effectively avoid multi-antenna interference and synchronization problems between transmitting antennas in tradit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/0452H04B7/06
CPCH04B7/0452H04B7/068H04B7/0697Y02D30/70
Inventor 肖丽霞肖悦范世文陈昱树蒋兆翔
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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