Zobrazeno 1 - 10
of 16
pro vyhledávání: '"Ce-lun LIU"'
Publikováno v:
Tongxin xuebao, Vol 36, Pp 240-245 (2015)
A frequency-domain segmental shift average periodogram acquisition algorithm for GPS signals with low SNR and high dynamic was proposed. First, the parallel rough compensation of Doppler frequency rate and C/A code phase as well as segmental FFT was
Externí odkaz:
https://doaj.org/article/e95d7dd999ed435480057e7bb718c475
Publikováno v:
Advanced Materials Research. :889-893
Non-Line-of-Sight (NLOS) propagation problems badly degrade the accuracy of wireless mobile positioning algorithms, which incurs a large positive bias in the Time-of-Arrival (TOA) measurements. Under several assumptions, the Hankel matrix of TOA data
Publikováno v:
Advanced Materials Research. :1084-1087
The error correction capability of BCH is very strong, especially for the short and medium length of codes, which performance reaches the theory value. Besides, it has a strict algebraic structure, which plays an important role in the encode theory.
Publikováno v:
Applied Mechanics and Materials. :1510-1513
Starting from pseudo-random interleaver and parallel convolution respectively, this paper has proposed a simple and fast LDPC encoding method without the loss of BER performance. when we use S-random interleaver, it has a good adaptation in both Gaus
Publikováno v:
Applied Mechanics and Materials. :734-737
For a coherent DDS/FFH system (deeply direct sequence and coherent fast frequency hopping hybrid spread spectrum system), signal has a very large spread spectrum ratio. Signal acquisition process becomes very complex and difficult due to interference
Publikováno v:
Management Information and Optoelectronic Engineering.
Publikováno v:
2013 IEEE INTERNATIONAL CONFERENCE ON MICROWAVE TECHNOLOGY & COMPUTATIONAL ELECTROMAGNETICS.
For a DS/FFH spectrum spread system, DAGC(Digital AGC) diversity combining is investigated. The performance of DAGC is evaluated under the case of partial-band jamming plus AWGN. Performances of several widely-used methods of diversity combining are
Publikováno v:
2010 International Conference on Computational Intelligence and Software Engineering.
For high-speed digital receivers, the crucial problem is to find a parallel carrier synchronization algorithm, but the traditional carrier synchronization methods based on phase-locked loop (PLL) are difficult to be parallel implemented. In this pape
Publikováno v:
2009 5th International Conference on Wireless Communications, Networking and Mobile Computing.
The frequency hopping (FH) communication systems are efficient systems for anti-jamming. When on the general partial-band jamming condition, the channel can be considered as burst jamming channel. In traditional FH systems, the Reed-Solomon (RS) code
Publikováno v:
2008 4th International Conference on Wireless Communications, Networking and Mobile Computing.
This paper focuses on implementing an efficient and simplified turbo decoder with FPGA. The Max-Log-MAP algorithm is employed and a simplified and improved Max-Log- MAP algorithm is present. By carefully manipulating hardware, we implement the whole