一种改进的TD-LTE下行定时同步算法

doi:10.11959/j.issn.1000-0801.2015030

Abstract

Abstract:

Aimed at the application problem of timing synchronization algorithm in orthogonal frequency division multiplexing system, an improved algorithm for TD-LTE downlink time synchronization was proposed. It utilizes statistical energy difference and correlation of cyclic prefix to improve the system performance, which reduces the computational complexity, and can detect the cyclic prefix types. The simulation results demonstrate that the performance of the new method is excellent in multi-path fading channels, especially in the case of small SNR. And it is robust against the normalized frequency offset and Doppler shift.

Key words: TD-LTE, cyclic prefix, downlink, timing synchronization

Wenle Bai,Xu Wang,Yongmei Zhang,Mugen Peng. An Improved Algorithm for TD-LTE Downlink Time Synchronization[J]. Telecommunications Science, 2015, 31(1): 72-76.

Figures/Tables 5

References 10

1	Van de Beek J J , Sandell M , Borjesson P O . ML estimation of time and frequency offset in OFDM systems. IEEE Transactions on Signal Processing, 1997, 45（7）: 1800～1805
b2	Ramasubramanian K , Baum K . An OFDM timing recovery scheme with inherent delay-spread estimation. Proceedings of IEEE Global Telecommunications Conference, Dallas, TX, USA, 2001: 3111～3115
3	Takahashi K , Saba T . A novel symbol synchronization algorithm with reduced influence of ISI for OFDM systems. Proceedings of IEEE Global Telecommunications Conference, Dallas, TX, USA, 2001: 524～528
4	周恩，陈茅茅，王文博 . 多径衰落信道下OFDM定时同步算法的研究. 北京邮电大学学报， 2005,28(3): 62～64 Zhou N , Chen M M , Wang W B . Anorel timing estimation method for OFDM systems over multipath fading channels. Journal of Beijing University of Post and Telecommunications, 2005,28(3): 62～64
5	3GPP TS 36.211，V10.5.0. Evolved Universal Terrestrial Radio Access（E-UTRA）. Physical Channels and Modulation（Release 10）, 2012
6	Xu W , Manolakis K . Robust synchronization for 3GPP LTE system. Proceedings of IEEE Global Communications Conference, Miami, FL, USA, 2010: 1～5
7	Kim Y B , Chang K H . Complexity optimized CP length pre-decision metric for cell searcher in the downlink of 3GPP LTE system. Proceedings of IEEE 20th International Symposium on Personal, Indoor and Mobile Radio Communications Symposium, Tokyo, Japan, 2009: 895～899
8	林雁，乐光新，尹长川 . LTE小区搜索中循环前缀类型判决和辅同步信号检测算法的改进. 吉林大学学报（工学版）， 2012,42(2): 499～504 Lin Y , Le G X , Yin C C . Improvement of CP type decision and SSS detection algorithm in cell search for LTE system. Journal of Jilin University（Engineering and Technology Edition）, 2012,42(1): 499～504
9	邝育军，侯晓林，乐光新 . 无线弥散信道下OFDM系统中时间同步方案的比较分析. 北京邮电大学学报， 2003,26(3): 75～80 Kuang Y Z , Hou X L , Le G X . A comparatire anglysis on time synchronization schemes in OFDM systems based upon dispersive channel model. Journal of Beijing University of Post and Telecommuncations, 2003,26(3): 75～80
10	Li X W , Wang Z Y , Liu F . A simplified scheme of synchronization algorithm in TD-LTE system. Proceedings of IEEE the 5th International Conference on Advanced Computational Intelligence, Nanjing, China, 2012:1158～1161

Metrics

Recommended 0

No Suggested Reading articles found!

系统带宽/ MHz	采样频率/ MHz	FFT点数	CP点数
系统带宽/ MHz	采样频率/ MHz	FFT点数	常规	扩展
1.4	1.92	128	9/10	32
3	3.84	256	18/20	64
5	7.68	512	36/40	128
10	15.36	1 024	72/84	256
15	23.04	1 536	108/120	384
20	30.72	2 048	144/160	512

[1]	Zhimin HE, Yuzhe LIN, Yujie CHENG, Shi YAN. Downlink wireless resource allocation method of V2X based on wireless sensing assistance [J]. Telecommunications Science, 2022, 38(9): 60-70.
[2]	Junfeng LAN,Chongli NIU,Guohui YU. Offshore coverage optimization and application of TD-LTE networks [J]. Telecommunications Science, 2018, 34(6): 36-42.
[3]	Xiang YU,Zhiyi ZHOU,Sirui DUAN,Heli CHEN. Improved UFMC symbol timing synchronization algorithm based on training sequence [J]. Telecommunications Science, 2018, 34(5): 7-12.
[4]	Bao FENG,Tao MA,Shilong CAI,Yang LI. Power allocation of MIMO system with RF mismatch in TD-LTE power wireless private network [J]. Telecommunications Science, 2018, 34(3): 177-182.
[5]	Pengfei WANG,Jian ZHENG. Interference analysis of TD-LTE downlink signal on S-band pulse radar fuse Abstract:Concerning that the TD-LTE downlink signal and pulse radar fuze signal may be interfered within 2 300 to 2 400 MHz band of S-band,the method of calculating the signal-to-interference ratio at the pulse radar fuse receiver was used.And the isolation distance that the TD-LTE downlink signal did not interfere the pulse radar fuze signal under the condition of other factors determined was obtained.The validity of the conclusion through the link level simulation was verified.At the same time,it was also obtained when the horizontal distance between the two was isolated distance,the transmission power of the base station was increased (or the fuze transmission power was reduced),the ground effective reflection area was reduced,the fuse will also be interfered by TD-LTE downlink signal. [J]. Telecommunications Science, 2018, 34(2): 23-31.
[6]	Tao DU,Xiaohui DENG,Gang LI. Analysis of operation environment influence of 1.8 GHz TDD-LTE industry private network [J]. Telecommunications Science, 2017, 33(10): 148-154.
[7]	Xiaoxia QIN,Chen WANG,Di QIAO. Backhaul carrying scheme of TD-LTE microcell base station [J]. Telecommunications Science, 2016, 32(4): 133-140.
[8]	Zhicheng WEN. LTE multi-user downlink throughput performance modeling and analysis [J]. Telecommunications Science, 2016, 32(10): 150-156.
[9]	Lunsuo WANG. TD-LTE and LTE FDD fusion networking strategy [J]. Telecommunications Science, 2016, 32(1): 188-192.
[10]	Anda DEN,Deping XU,Linjie SUN,GLujing GEN,Xinning SHI,Xiang WAVG. Research and suggestion on the choice of the acceptance indexes of the TD-LTE VoLTE wireless network engineering [J]. Telecommunications Science, 2015, 31(Z1): 27-32.
[11]	Li YU,Xusong ZHAO,Xugang ZHENG,Weiming YE,Zhenzhe WU. LTE FDD and TD-LTE sea area coverage test [J]. Telecommunications Science, 2015, 31(Z1): 53-57.
[12]	Congsheng QI,Guibin TIAN. TD-LTE refinement planning and marketing based on user behavior [J]. Telecommunications Science, 2015, 31(Z1): 58-62.
[13]	Guoqing Jia,Shanji Chen,Chao Chen,Xiaohong Ji,Weidong Fang. A Polarity Reversion Elimination Method for LTE-Advanced Frequency Offset Estimation [J]. Telecommunications Science, 2015, 31(8): 58-62.
[14]	Chang Li,Jianbin Zhang,Jing An. TD-LTE and TD-SCDMA Collaborative Network Optimizing Strategy [J]. Telecommunications Science, 2015, 31(8): 139-146.
[15]	Li Gui,Luohui Xia. Study and Application on RF Conformance Testing of TD-LTE Base Station [J]. Telecommunications Science, 2015, 31(5): 107-113.

An Improved Algorithm for TD-LTE Downlink Time Synchronization

RichHTML

PDF下载

Knowledge

Cited

Abstract

Cite this article

share this article

Figures/Tables 5

References 10

Related Articles 15

Metrics

Recommended 0