CN107592278A - The small base station down receiving terminal channel estimation methods of TDD/FDD LTE - Google Patents
The small base station down receiving terminal channel estimation methods of TDD/FDD LTE Download PDFInfo
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- CN107592278A CN107592278A CN201711112100.3A CN201711112100A CN107592278A CN 107592278 A CN107592278 A CN 107592278A CN 201711112100 A CN201711112100 A CN 201711112100A CN 107592278 A CN107592278 A CN 107592278A
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- pilot tone
- channel estimation
- tdd
- channel value
- base station
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses the small base station down receiving terminal channel estimation methods of TDD/FDD LTE, comprise the following steps：Step 1：The FFT conversion of OFDM symbols where completing pilot tone；Step 2：According to the extraction frequency pilot sign such as logic district ID and antenna port configuration；Step 3：The conjugation of pilot tone basic sequence is generated, is multiplied with the pilot tone received, to remove basic sequence；Step 4：Pilot tone after being removed to basic sequence carries out ZF and channel value H and channel value G is calculated；Step 5：Time domain, the linear interpolation of frequency domain are completed according to channel value H and channel value G, by a group output channel estimation results.The small base station down receiving terminal channel estimation methods of TDD/FDD LTE of the present invention are applicable for the TDD/FDD systems of non-fast fading channel.
Description
Technical field
The present invention relates to the small base station down receiving terminal channel estimation methods of TDD/FDD-LTE.
Background technology
LTE (Long Term Evolution) small base station is a kind of forth generation radio communication skill based on OFDMA technologies
Art, including FDD (i.e. frequency division multiplexing)/TDD (i.e. time division multiplexing) both of which, correspond to symmetrical spectrum and asymmetric frequency respectively
Spectrum, and the various bandwidths such as 1.4MHz, 5MHz, 10MHz, 15MHz and 20MHz are supported simultaneously.The up-downgoing of LTE systems according to
Different modulation system, different bandwidth show different handling capacities.By taking FDD LTE downlink receptions end as an example, selection is adjusted
Coding mode 28 processed, in the case of taking 100 Physical Resource Block, the handling capacity of single frames can reach 28Mbps.In order to
Antenna data is demodulated correctly and efficiently, receiving terminal will undergo the digital signal processings such as channel estimation, channel equalization,
In wireless system, transmitting terminal to receiving end signal propagation path is often all very complicated, so front channels estimation becomes critically important.
It is whether up or descending in LTE systems, all it is the channel estimation method based on reference signal sequence used.It is based on
The channel estimation of frequency pilot sign is applied to the system continuously transmitted.Accorded with by pilot tone known to the insertion in the useful data of transmission
Number, the channel estimation results of pilot frequency locations can be obtained；Followed by the channel estimation results of pilot frequency locations, obtained by interpolation
The channel estimation results of useful data position, complete channel estimation.
The content of the invention
It is an object of the invention to provide a kind of TDD/FDD-LTE downlink receptions end channel estimation method, the channel estimation
Algorithm is applicable for the TDD/FDD systems of non-fast fading channel.
To achieve these goals, the technical scheme is that the small base station down receiving terminal letters of design TDD/FDD-LTE
Channel estimation algorithm, comprise the following steps：
Step 1：The FFT conversion of OFDM symbols where completing pilot tone；
Step 2：According to the extraction frequency pilot sign such as logic district ID and antenna port configuration；
Step 3：The conjugation of pilot tone basic sequence is generated, is multiplied with the pilot tone received, to remove basic sequence；
Step 4：Pilot tone after being removed to basic sequence carries out ZF and channel value H and channel value G is calculated；
Step 5：Time domain, the linear interpolation of frequency domain are completed according to channel value H and channel value G, by a group output channel estimation knot
Fruit.
The advantages of the present invention are：The present invention connects to be applicable the small base station downs of TDD/FDD-LTE simultaneously
The channel estimation method of receiving end, coordinate back segment MMSE equalization algorithms, from the point of view of the simulation result of planisphere is received, can meet
In the functional test requirement of laboratory stage.
Embodiment
With reference to embodiment, the embodiment of the present invention is further described.Following examples are only used for more
Add and clearly demonstrate technical scheme, and can not be limited the scope of the invention with this.
Embodiment：
The small base station down receiving terminal channel estimation methods of TDD/FDD-LTE, comprise the following steps：
Step 1：The FFT conversion of OFDM symbols where completing pilot tone；
Step 2：According to the extraction frequency pilot sign such as logic district ID and antenna port configuration；
Step 3：The conjugation of pilot tone basic sequence is generated, is multiplied with the pilot tone received, to remove basic sequence；
Step 4：Pilot tone after being removed to basic sequence carries out ZF and channel value H and channel value G is calculated；
Step 5：Time domain, the linear interpolation of frequency domain are completed according to channel value H and channel value G, by a group output channel estimation knot
Fruit.
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, some improvements and modifications can also be made, these improvements and modifications
Also it should be regarded as protection scope of the present invention.
Claims (1)
- The small base station down receiving terminal channel estimation methods of 1.TDD/FDD-LTE, it is characterised in that comprise the following steps：Step 1：The FFT conversion of OFDM symbols where completing pilot tone；Step 2：According to the extraction frequency pilot sign such as logic district ID and antenna port configuration；Step 3：The conjugation of pilot tone basic sequence is generated, is multiplied with the pilot tone received, to remove basic sequence；Step 4：Pilot tone after being removed to basic sequence carries out ZF and channel value H and channel value G is calculated；Step 5：Time domain, the linear interpolation of frequency domain are completed according to channel value H and channel value G, by a group output channel estimation knot Fruit.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711112100.3A CN107592278A (en) | 2017-11-13 | 2017-11-13 | The small base station down receiving terminal channel estimation methods of TDD/FDD LTE |
| PCT/CN2017/110771 WO2019090789A1 (en) | 2017-11-13 | 2017-11-14 | Channel estimation algorithm for tdd/fdd-lte small cell downlink receiving end |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711112100.3A CN107592278A (en) | 2017-11-13 | 2017-11-13 | The small base station down receiving terminal channel estimation methods of TDD/FDD LTE |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107592278A true CN107592278A (en) | 2018-01-16 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711112100.3A Pending CN107592278A (en) | 2017-11-13 | 2017-11-13 | The small base station down receiving terminal channel estimation methods of TDD/FDD LTE |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN107592278A (en) |
| WO (1) | WO2019090789A1 (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103636154A (en) * | 2011-07-06 | 2014-03-12 | 富士通株式会社 | Base station, wireless terminal, channel value estimation method, pilot signal transmission method, and wireless communication system |
| CN104202272A (en) * | 2014-09-03 | 2014-12-10 | 苏州微站通信科技有限公司 | TDD/FDD (Time Division Duplex/Frequency Division Duplex)-LTE (Long Term Evolution) small base station downlink receiving terminal channel estimation algorithm |
| CN104883327A (en) * | 2014-11-21 | 2015-09-02 | 广东省电信规划设计院有限公司 | Channel estimation method and system based on two-dimensional interpolation |
| US20170019160A1 (en) * | 2003-05-21 | 2017-01-19 | Regents Of The University Of Minnesota | Estimating Frequency-Offsets and Multi-Antenna Channels in Mimo OFDM Systems |
| US20170222841A1 (en) * | 2016-01-29 | 2017-08-03 | Lilee Systems, Ltd. | Method and Apparatus of Iterative Channel Tracking for MIMO-OFDM System |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9509542B1 (en) * | 2015-12-08 | 2016-11-29 | Mbit Wireless, Inc. | Method and apparatus for channel estimation tolerant to timing errors |
-
2017
- 2017-11-13 CN CN201711112100.3A patent/CN107592278A/en active Pending
- 2017-11-14 WO PCT/CN2017/110771 patent/WO2019090789A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20170019160A1 (en) * | 2003-05-21 | 2017-01-19 | Regents Of The University Of Minnesota | Estimating Frequency-Offsets and Multi-Antenna Channels in Mimo OFDM Systems |
| CN103636154A (en) * | 2011-07-06 | 2014-03-12 | 富士通株式会社 | Base station, wireless terminal, channel value estimation method, pilot signal transmission method, and wireless communication system |
| CN104202272A (en) * | 2014-09-03 | 2014-12-10 | 苏州微站通信科技有限公司 | TDD/FDD (Time Division Duplex/Frequency Division Duplex)-LTE (Long Term Evolution) small base station downlink receiving terminal channel estimation algorithm |
| CN104883327A (en) * | 2014-11-21 | 2015-09-02 | 广东省电信规划设计院有限公司 | Channel estimation method and system based on two-dimensional interpolation |
| US20170222841A1 (en) * | 2016-01-29 | 2017-08-03 | Lilee Systems, Ltd. | Method and Apparatus of Iterative Channel Tracking for MIMO-OFDM System |
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| Publication number | Publication date |
|---|---|
| WO2019090789A1 (en) | 2019-05-16 |
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Application publication date: 20180116 |