Run‐length method for determining the segmentation length based on the segmentation long‐code blind estimation

Xia, Wenlong; Zhou, Yuanping; Meng, Qingdang

doi:10.1049/iet-spr.2016.0018

Cited by 6 publications

(3 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…From Equation ( 6), we can obtain that the overall channel response is the convolution of the spreading sequence and the multipath channel. Given the sub-channel response by Equation (25), we can rearrange the channel response as…”

Section: Subspace Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Blind despreading and deconvolution of asynchronous multiuser direct sequence spread spectrum signals under multipath channels

Zhang

et al. 2023

IET Signal Processing

View full text Add to dashboard Cite

In non-cooperative scenarios, the spreading sequences or waveforms of the direct sequence spread spectrum (DSSS) signals is unknown to the receiver. This paper focuses on addressing the problem of blind estimation of the spreading waveform under multipath channels. In the scenario of direct signal path transmission, the spreading sequences can be directly obtained based on the estimated spreading waveforms. However, in the presence of multipath channels, the spreading waveform becomes the convolution of the spreading sequence and channel response, thus deconvolution should also be performed after estimating the spreading waveforms. In order to perform blind despreading and deconvolution of asynchronous multiuser DSSS signals under multipath channels, the authors propose to exploit the finite symbol characteristics of information and spreading sequences and then the iterative least square with projection method is adopted. Besides, the Cramer-Rao bound of spreading waveforms is derived in such a circumstance as a performance benchmark. The effectiveness of the proposed method is verified via simulation experiments.

show abstract

Section: Subspace Methodsmentioning

confidence: 99%

“…When the PN sequence length is long, many of the previously mentioned algorithms exhibit high computational complexity. To overcome this issue, several improved algorithms have been proposed [23][24][25]. Neuron network (NN) also offer an effective method for obtaining the PN sequence.…”

Section: Introductionmentioning

confidence: 99%

Blind despreading and deconvolution of asynchronous multiuser direct sequence spread spectrum signals under multipath channels

Zhang

et al. 2023

IET Signal Processing

View full text Add to dashboard Cite

show abstract

“…However, the criterion of determining the segmentation length is not considered. On the basis of the work of reference [9], the segmentation length criterion is proposed, which is suitable for both LC-DSSS signals and LC-DS-CDMA signals [10].…”

mentioning

confidence: 99%

Blind Estimation of PN Codes in Multi-user LSC-DSSS Signals

Zhao¹,

Gu²,

Qiang³

et al. 2017

JCM

View full text Add to dashboard Cite

Aiming at the problem of blind estimation of Pseudo-random (PN) sequences in multiuser long scrambling code direct sequence spread spectrum (LSC-DSSS) signals, in this paper, we proposed a novel PN sequences estimation method based on Fast-ICA algorithm and third-order statistics. The received signal is firstly divided twice into segments and then the segments are transformed into several array signal block matrixes based on the periodicities of scrambling codes and spreading codes. Every user's PN sequence is separated segment-by-segment using Fast-ICA algorithm, and those segments are assembled sequentially into fuzzy sequences. Finally, all the scrambling codes and spreading codes are estimated from the fuzzy sequences based on the triple correlation properties of m-sequences. The simulation results show the excellent performance of the proposed method.

show abstract

Estimating Symbol Duration of Long-Code Direct Sequence Spread Spectrum Signals at a Low Signal-to-Noise Ratio

Huang

Liang

Wang

2020

Wireless Pers Commun

View full text Add to dashboard Cite

Run‐length method for determining the segmentation length based on the segmentation long‐code blind estimation

Cited by 6 publications

References 22 publications

Blind despreading and deconvolution of asynchronous multiuser direct sequence spread spectrum signals under multipath channels

Blind despreading and deconvolution of asynchronous multiuser direct sequence spread spectrum signals under multipath channels

Blind Estimation of PN Codes in Multi-user LSC-DSSS Signals

Estimating Symbol Duration of Long-Code Direct Sequence Spread Spectrum Signals at a Low Signal-to-Noise Ratio

Contact Info

Product

Resources

About