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Method for indicating direct current subcarrier and communication device

A communication device and DC sub-technology, applied in the field of communication, can solve the problems such as affecting the signal processing of the receiving end, affecting the decoding performance, leakage, etc.

Pending Publication Date: 2022-01-11
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is necessary to perform Doppler frequency offset compensation on the satellite side or on the terminal side, otherwise it will affect the decoding performance, and even the system will not work
[0004] However, after Doppler frequency offset compensation, the subcarriers affected by the DC leakage at the transmitting end may not coincide with the subcarriers affected by the DC leakage at the receiving end (not within a subcarrier interval), that is, the receiving end The bandwidth part (BWP) at the end will be affected by two DC leakages, which will affect the signal processing at the receiving end

Method used

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  • Method for indicating direct current subcarrier and communication device
  • Method for indicating direct current subcarrier and communication device
  • Method for indicating direct current subcarrier and communication device

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0142] DC sub-carrier protocol fields defined 38.331 SCS-SpecificCarrier used to indicate (txDirectCurrentLocation) ranges [0,4095], wherein the effective index of 0 to 3300, indicating the transmitting end of the point A with respect to DC position, in units of subcarriers, illegal 3301 to 4095 / reserved. In particular, from 0 to 3299 DC sub-carrier indicates the subcarrier corresponding to the receiving end of the carrier frequency band interval 3300 indicating that the DC subcarrier subcarrier receiving end of the carrier frequency band corresponding to the spacer. TxDirectCurrentLocation range represented by the number field 12 bits (bit) unsigned.

[0143] In the present example, the above protocol may be defined for 38.331 valid index range field indicates the DC subcarrier extended [-X, Y], X can be in the range [Z, 4096], Y can be in the range of [3300 + Z, 4095], Z is greater than or equal to 0, indicating that the DC transmission side with respect to the point a, in uni...

example 2

[0150] Similar to Example 1, except that the first communication means acquires the second information from the second communication device.

[0151] RRC may modify or add information elements (RRC information element), in particular, as follows:

[0152]

[0153]

[0154] A first communication means acquires the Doppler frequency offset value between the first communication means and second communication means, and the first information for the DC subcarrier frequency point indicating the position of the second communication apparatus employed corresponding after the index, the transceiver determines both the DC sub-carrier is within the corresponding first communication device BWP.

example 3

[0156] The same protocol for the SCS-SpecificCarrier defined 38.331 improved. In the present example, the valid index for the above-described range field indicates the DC subcarrier modified to [0, Y], Y is greater than 3300 + Z and less than or equal to 4095, Z greater than or equal to 0, indicating that the transmitting side and DC point a number of sub-carriers spaced; increase txDirectCurrentLocation_Direction SCS-SpecificCarrier field for indicating a transmitting terminal of the DC offset with respect to the direction of Point a. Field range txDirectCurrentLocation improved still 12 bits (bit) unsigned FIG.

[0157] Specifically, as shown below:

[0158]

[0159] Alternatively, [Y + 1,4095] can retain, it may also be used valid indication.

[0160] The second communication means may transmit the first information to the first communication device via SCS-SpecificCarrier improved.

[0161]The first communication device can indicate the second communication device to indicat...

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Abstract

The invention provides a method for indicating a direct current subcarrier and a communication device, and in the technical scheme of the invention, a second communication device can display or implicitly indicate the position of a first direct current subcarrier and the position of a second direct current subcarrier to a first communication device, the first direct-current subcarrier is a direct-current subcarrier corresponding to a transmitting frequency point adopted by the second communication device, and the second direct-current subcarrier is a direct-current subcarrier corresponding to a receiving frequency point adopted by the first communication device. Therefore, the first communication device can display or implicitly know whether the direct current subcarriers on the transmitting and receiving sides are in the carrier frequency band corresponding to the first communication device, so that reasonable processing is carried out, and the first communication device can process signals conveniently.

Description

Technical field [0001] The present application relates to the field of communications, and more particularly, to a method and a communication apparatus indicating that the DC subcarrier. Background technique [0002] As the satellite communication less affected by geographical conditions, it can achieve global coverage, so the development of satellite communications has very important significance. Especially when the subject of natural disasters, making the local communications infrastructure has been severely damaged and can not be normal communication, satellite communication can provide a strong guarantee for the effective communication of disaster rescue. Further, in some unfavorable ground station erected region, including oceans, deserts, mountains, etc., can effectively communicate through satellite communication, to ensure full coverage of communication. [0003] Since the relative velocity between the satellite and the terminal device quickly produces a large Doppler fr...

Claims

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Application Information

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IPC IPC(8): H04B7/185
CPCH04B7/18504H04B7/18513H04B7/18515H04B7/18517H04B7/18519H04B7/18506H04B7/185H04L5/0048H04L27/0014H04L2027/0026H04L27/2657H04L5/0092H04L27/26025H04L5/0098H04L5/023
Inventor 蒋镇军乔云飞周建伟徐晨蕾
Owner HUAWEI TECH CO LTD
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