CN108242984B - Method for generating pilot frequency sequence of multi-sub-band system - Google Patents

Method for generating pilot frequency sequence of multi-sub-band system Download PDF

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Publication number
CN108242984B
CN108242984B CN201611204135.5A CN201611204135A CN108242984B CN 108242984 B CN108242984 B CN 108242984B CN 201611204135 A CN201611204135 A CN 201611204135A CN 108242984 B CN108242984 B CN 108242984B
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sequence
sub
pilot
subband
bands
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CN108242984A (en
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龚秋莎
王丽
闫亮
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Potevio Information Technology Co Ltd
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Potevio Information Technology Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H04J13/0007—Code type
    • H04J13/0055—ZCZ [zero correlation zone]
    • H04J13/0059—CAZAC [constant-amplitude and zero auto-correlation]
    • H04J13/0062—Zadoff-Chu

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Power Engineering (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The application discloses a pilot frequency sequence of a multi-subband systemThe method comprises obtaining a first pilot sequence according to the number of sub-bands in the bandwidth occupied by the system; the first pilot sequence is then split into
Figure DDA0001189660200000011
A small sequence is used as a pilot for each subband, wherein,
Figure DDA0001189660200000012
is the number of subbands. By applying the technical scheme disclosed by the application, the peak-to-average ratio of the pilot signal is not increased due to the increase of the bandwidth, so that the complexity of system design is reduced.

Description

Method for generating pilot frequency sequence of multi-sub-band system
Technical Field
The present application relates to the field of mobile communications technologies, and in particular, to a method for generating a pilot sequence of a multi-subband system.
Background
With the continuous development of new wireless communication technologies and the explosion development of mobile internet and internet of things industries, the requirements of various industries on radio broadband services such as video monitoring, video live broadcast and the like are rapidly expanded, radio frequency spectrums of private networks of some industries have the characteristics of dispersion and narrow bands, and how to better aggregate the requirements of a plurality of dispersion narrow bands on supporting broadband services becomes a focus of attention.
A pilot sequence design scheme of a Physical Uplink Shared Channel (PUSCH) of a private network system supports broadband service requirements by circulating a short ZC sequence on a single subband and then expanding the short ZC sequence on multiple subbands. However, when the service bandwidth exceeds 1M, due to the limited cyclic shift of the sequence, the number of subbands with the same phase pilot frequency is increased, so that the signal peak-to-average ratio of the broadband service becomes large, and the complexity of system design is increased.
Disclosure of Invention
The application provides a method for generating a pilot sequence of a multi-subband system, so that the peak-to-average power ratio of a pilot signal is not increased due to the increase of bandwidth, and the complexity of system design is reduced.
The application discloses a method for generating a pilot frequency sequence of a multi-subband system, which comprises the following steps:
obtaining a first pilot frequency sequence according to the number of sub-bands in the bandwidth occupied by the system;
partitioning the first pilot sequence into
Figure BDA0001189660180000011
A small sequence is used as a pilot for each subband, wherein,
Figure BDA0001189660180000012
is the number of subbands.
Preferably, the obtaining the first pilot sequence according to the number of subbands in the bandwidth occupied by the system includes: generating a first pilot sequence according to the following formula:
Figure BDA0001189660180000013
Figure BDA0001189660180000021
wherein,
Figure BDA0001189660180000022
for the length of the first pilot sequence, according to the number of sub-bands
Figure BDA0001189660180000023
And the number of sub-carriers contained in a single sub-band
Figure BDA0001189660180000024
Determining;
base sequence
Figure BDA0001189660180000025
Wherein
Figure BDA0001189660180000026
Figure BDA0001189660180000027
Is the length of the base sequence and is such that
Figure BDA0001189660180000028
The maximum prime number of;
Figure BDA0001189660180000029
the number of subcarriers contained in a single subband;
Figure BDA00011896601800000210
is the number of subbands;
q＝floor(q0+1/2)；
Figure BDA00011896601800000211
Figure BDA00011896601800000212
q0, q and u are intermediate parameters, the value range of u is 0-29, floor () is a down rounding operation,
Figure BDA00011896601800000213
is a cell ID number.
Preferably, the dividing the first pilot sequence into
Figure BDA00011896601800000214
The small sequences as pilots for each subband include:
when resource mapping is carried out, r isPUSCHIn sequence (a)
Figure BDA00011896601800000215
Each point being mapped to the ith sub-band
Figure BDA00011896601800000216
Personal carrierOn the wave.
Preferably, the
Figure BDA00011896601800000217
Greater than 40.
According to the technical scheme, the method provided by the application comprises the steps that firstly, a long ZC sequence is obtained according to the number of subcarriers in the bandwidth occupied by the system; the long ZC sequence is then partitioned into
Figure BDA00011896601800000218
A small sequence is used as a pilot for each subband, wherein,
Figure BDA00011896601800000219
is the number of subbands. By applying the technical scheme disclosed by the application, the peak-to-average ratio of the pilot signal is not increased due to the increase of the bandwidth, so that the complexity of system design is reduced.
Drawings
Fig. 1 is a flow chart illustrating a method for generating a pilot sequence of a multi-subband system according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is further described in detail below by referring to the accompanying drawings and examples.
The invention provides a method for generating a pilot sequence of a PUSCH (physical uplink shared channel) of a multi-subband system, which comprises the following steps as shown in figure 1:
step 101: and obtaining a long ZC sequence as a pilot frequency sequence according to the number of sub-bands in the occupied bandwidth.
The "long ZC sequence" is compared to existing ZC sequences that are generated based on a single subband width, and is generated based on the number of subbands occupying the bandwidth.
Step 102: partitioning the long ZC sequence into
Figure BDA0001189660180000031
A small sequence is used as a pilot for each subband, wherein,
Figure BDA0001189660180000032
is the number of subbands.
Through the processing, the peak-to-average ratio of the pilot signal is not increased due to the increase of the bandwidth, so that the complexity of system design is reduced.
A specific generation method of the PUSCH channel pilot sequence in the multi-subband system according to the present invention will be described in detail below.
Pilot sequence r of PUSCHPUSCH(. cndot.) is defined as:
Figure BDA0001189660180000033
Figure BDA0001189660180000034
wherein,
Figure BDA0001189660180000035
for the length of the pilot sequence, according to the number of sub-bands
Figure BDA0001189660180000036
And the number of sub-carriers contained in a single sub-band
Figure BDA0001189660180000037
Determining;
wherein, the base sequence
Figure BDA0001189660180000038
Wherein
Figure BDA0001189660180000039
Figure BDA00011896601800000310
Is the length of the long ZC sequence (i.e., the base sequence) of the invention, and is satisfied
Figure BDA00011896601800000311
The maximum prime number of;
Figure BDA0001189660180000041
the number of subcarriers contained in a single subband;
Figure BDA0001189660180000042
is the number of subbands;
q＝floor(q0+1/2)；
Figure BDA0001189660180000043
Figure BDA0001189660180000044
wherein q0, q and u are intermediate parameters, the value range of u is 0-29, floor () is a down rounding operation,
Figure BDA0001189660180000045
is a cell ID number.
When mapping resources, r isPUSCHThe sequence is divided into small sequences as pilots for each subband, i.e. rPUSCHIn sequence (a)
Figure BDA0001189660180000046
Each point being mapped to the ith sub-band
Figure BDA0001189660180000047
On the subcarriers.
In order to be compatible with the existing pilot mode, the pilot frequency can be generated by adopting the existing mode below 40 sub-bands (including 40 sub-bands), and the new pilot frequency generation scheme proposed by the invention is adopted above 40 sub-bands.
The specific generation of the PUSCH channel pilot sequence below 40 subbands (including 40 subbands) is described below.
Pilot sequence r of PUSCHPUSCH(. cndot.) is defined as:
Figure BDA0001189660180000048
wherein:
Figure BDA0001189660180000049
Figure BDA00011896601800000410
Figure BDA00011896601800000411
is the number of sub-carriers contained in a single sub-band,
Figure BDA00011896601800000412
is the number of subbands.
Wherein, the base sequence
Figure BDA00011896601800000413
Figure BDA00011896601800000414
Figure BDA00011896601800000415
Figure BDA00011896601800000416
The cyclic shift factor α is obtained according to the following equation:
Figure BDA0001189660180000051
Figure BDA0001189660180000052
Figure BDA0001189660180000053
is the length of the Zadoff-Chu sequence,
Figure BDA0001189660180000054
when mapping resources, rPUSCHIn sequence (a)
Figure BDA0001189660180000055
Mapped to the ith sub-band
Figure BDA0001189660180000056
On the subcarriers.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the scope of protection of the present application.

Claims (3)

1. A method for generating a pilot sequence of a multi-subband system, comprising:
obtaining a first pilot frequency sequence according to the number of sub-bands in the bandwidth occupied by the system;
partitioning the first pilot sequence into
Figure FDA0002721341830000011
A small sequence is used as a pilot for each subband, wherein,
Figure FDA0002721341830000012
is the number of sub-bands;
the obtaining the first pilot sequence according to the number of sub-bands in the bandwidth occupied by the system includes: generating a first pilot sequence according to the following formula:
Figure FDA0002721341830000013
Figure FDA0002721341830000014
wherein,
Figure FDA0002721341830000015
for the length of the first pilot sequence, according to the number of sub-bands
Figure FDA0002721341830000016
And the number of sub-carriers contained in a single sub-band
Figure FDA0002721341830000017
Determining;
base sequence
Figure FDA0002721341830000018
Wherein
Figure FDA0002721341830000019
Figure FDA00027213418300000110
Is the length of the base sequence and is such that
Figure FDA00027213418300000111
The maximum prime number of;
Figure FDA00027213418300000112
the number of subcarriers contained in a single subband;
Figure FDA00027213418300000113
is the number of subbands;
q＝floor(q0+1/2)；
Figure FDA00027213418300000114
Figure FDA00027213418300000115
q0, q and u are intermediate parameters, the value range of u is 0-29, floor () is a down rounding operation,
Figure FDA00027213418300000116
is a cell ID number.
2. The method of claim 1, wherein the partitioning the first pilot sequence into
Figure FDA00027213418300000117
The small sequences as pilots for each subband include:
when resource mapping is carried out, r isPUSCHIn sequence (a)
Figure FDA0002721341830000021
Each point being mapped to the ith sub-band
Figure FDA0002721341830000022
On the subcarriers.
3. The method according to claim 1 or 2, characterized in that:
the above-mentioned
Figure FDA0002721341830000023
Greater than 40.
CN201611204135.5A 2016-12-23 2016-12-23 Method for generating pilot frequency sequence of multi-sub-band system Expired - Fee Related CN108242984B (en)

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CN101340273A (en) * 2007-07-04 2009-01-07 华为技术有限公司 Multi-address access method, apparatus and system
CN101433004A (en) * 2006-04-25 2009-05-13 日本电气株式会社 Pilot signal transmitting method and wireless communication apparatus
CN101438523A (en) * 2006-06-23 2009-05-20 松下电器产业株式会社 Radio transmitter, radio receiver, and pilot generating method

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US9288096B2 (en) * 2009-12-07 2016-03-15 Qualcomm Incorporated Enabling phase tracking for a communication device

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101433004A (en) * 2006-04-25 2009-05-13 日本电气株式会社 Pilot signal transmitting method and wireless communication apparatus
CN101438523A (en) * 2006-06-23 2009-05-20 松下电器产业株式会社 Radio transmitter, radio receiver, and pilot generating method
CN101340273A (en) * 2007-07-04 2009-01-07 华为技术有限公司 Multi-address access method, apparatus and system

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