Acquisition of Pseudonoise Signals by Sequential Estimation

Key Words : DSSS (direct sequence spread spectrum), RASE (rapid acquisition sequential estimation), SASE (seed accumulating sequential estimation), RSSE (recursive soft sequential estimation) ABSTRACTIn the direct sequence spread spectrum system, the correct synchronization is very important; hence, several acquisition schemes based on the sequential estimation have been developed. Typically, the rapid acquisition sequential estimation (RASE) scheme, the seed accumulating sequential estimation (SASE) scheme, the recursive soft sequential estimation (RSSE) scheme have been developed for the correct acquisition. However, the objective performance comparison and analysis between former estimation schemes have not been performed so far. In thispaper, we compare and analyze the performance of the above sequential estimation schemes by simulating the correct chip probability and the mean acquisition time (MAT).

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“…되어 왔다 [4][5][6][7][8] . 이들 중 직렬 검색 방법은 [4] rapid acquisition sequential estimation (RASE) 기법 이 제안되었다 [6] .…”

Section: 현재까지 부호 획득을 위한 다양한 연구들이 진행unclassified

“…이들 중 직렬 검색 방법은 [4] rapid acquisition sequential estimation (RASE) 기법 이 제안되었다 [6] . RASE 기법은 신호 대 잡음비가 (signal-to-noise ratio: SNR) 매우 낮지만 않으면 Fig.…”

Section: 현재까지 부호 획득을 위한 다양한 연구들이 진행unclassified

Performance Analysis of Sequential Estimation Schemes for Fast Acquisition of Direct Sequence Spread Spectrum Systems

Lee

Chae

Yoon

et al. 2014

The Journal of Korea Information and Communications Society

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“…Ward proposed an m-sequence acquisition arrangement as early as 1965 [5], which was later relied upon by the solutions conceived in [6,7]. The basic principle relies on generating m chips by a local m-sequence generator E-mail: {aa28g08, p.botsinis, sw6f12, lly, lh}@ecs.soton.ac.uk, http://wwwmobile.ecs.soton.ac.uk.…”

Section: Introductionmentioning

confidence: 99%

EXIT Chart Aided Convergence Analysis of Recursive Soft <inline-formula> <tex-math notation="LaTeX">$m$</tex-math> </inline-formula>-Sequence Initial Acquisition in Nakagami-m Fading Channels

Ahmed

Botsinis

Won

et al. 2018

IEEE Trans. Veh. Technol.

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Abstract-A delay of less than one millisecond is required by low-latency 5G wireless communication systems for supporting the 'tactile' Internet. Hence, conventional initial synchronisation cannot be readily employed because of its potentially excessive delay. In this paper, an EXtrinsic Information Transfer (EXIT) Chart assisted approach is used for the convergence analysis of m-sequences using Recursive Soft Sequence Estimation (RSSE) in the context of Nakagami-m fading channels. Explicitly, the novelty of our work is based on employing a new type of EXIT Charts operating without using interleavers. This is a challenge, because the original EXIT charts rely on the employment of long, high-delay interleavers for ensuring that the inputs to the decoders become uncorrelated. We then evaluate the performance of various classes of m-sequences with the aid of the proposed EXIT charts and demonstrate that the m-sequences generated by the lower-order polynomials maximise the mutual information more promptly with the aid of our RSSE scheme than those, which belong to a higher-order polynomial.

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“…However, most of them have been designed for single-input single-output systems [3]- [10]. A variety of serial-search [3], [5]- [7], parallelsearch [3], [4], [8], [11], as well as sequential-estimation [9], [10]-based code-acquisition techniques have been proposed in the literature.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Serial-Search-Based Code Acquisition in the Multiple-Transmit/Multiple-Receive-Antenna-Aided DS-CDMA Downlink

Won

Hanzo

2008

IEEE Trans. Veh. Technol.

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Abstract-In this paper, we investigate the serial-search-based initial code-acquisition performance of direct-sequence code division multiple access (DS-CDMA) employing multiple transmit/ multiple receive antennas when communicating over uncorrelated Rayleigh channels. We characterize the associated performance trends as a function of the number of antennas. It is demonstrated that, in contrast to our expectation, the achievable correctdetection probability degrades in our typical target operational E c /I 0 range as the number of transmit antennas is increased. When maintaining a given total transmit power, our findings suggest that increasing the number of transmit antennas results in the combination of the low-energy noise-contaminated signals of the transmit antennas, which ultimately increases the mean acquisition time (MAT). However, it is extremely undesirable to increase the MAT when the system is capable of attaining its target bit-error-ratio performance at reduced signal-power levels, as a benefit of employing multiple transmit antennas.Index Terms-Code acquisition, direct-sequence code division multiple access (DS-CDMA), multiple transmit/multiple receive antennas (MTMR), serial search.

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Acquisition of Pseudonoise Signals by Sequential Estimation

Cited by 124 publications

References 2 publications

Performance Analysis of Sequential Estimation Schemes for Fast Acquisition of Direct Sequence Spread Spectrum Systems

Performance Analysis of Sequential Estimation Schemes for Fast Acquisition of Direct Sequence Spread Spectrum Systems

EXIT Chart Aided Convergence Analysis of Recursive Soft <inline-formula> <tex-math notation="LaTeX">$m$</tex-math> </inline-formula>-Sequence Initial Acquisition in Nakagami-m Fading Channels

Analysis of Serial-Search-Based Code Acquisition in the Multiple-Transmit/Multiple-Receive-Antenna-Aided DS-CDMA Downlink

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