Performances of DS/SSMA communications with MPSK signaling and complex signature sequences

Ozluturk, F.M.; Tantaratana, S.; Lam, A.W.

doi:10.1109/26.380144

Cited by 9 publications

(6 citation statements)

References 12 publications

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“…For the purpose of this analysis, we assume the elements of the code take on the values of 1 (i.e., a binary code) with equal probability. Note that the analysis can be generalized to a broader set of complex signature codes [19]. By using these quantized phase codes with alphabet size greater than two, the number of available signature sequences is greatly enlarged, thus supporting many users.…”

Section: Statistical Properties Of Encoded Ulpsmentioning

confidence: 99%

“…Proof: See Appendix D. From the conditional pairwise error probability, we get the unconditional pairwise error probability as (19) To evaluate (19), the pdf of must be known. Since and are functions of , in principle, it could be obtained from the pdf of .…”

Section: Performance Analysis and Numerical Evaluationmentioning

confidence: 99%

“…However, there does not appear to be a way of obtaining the pdf in closed form. Thus, we will use three methods to evaluate (19). The first two are numerical evaluations based on approximations of the pdf of obtained by truncating the function in the time-varying variance, and will be described later; the other is an -level approximation shown in Fig.…”

Section: Performance Analysis and Numerical Evaluationmentioning

confidence: 99%

“…Then, it is easily seen that , , and the probability of this event for a given is . Therefore, we can approximate (19) as (21) where (22) information symbols, we get the union bound on the symbol error probability as…”

Section: Performance Analysis and Numerical Evaluationmentioning

confidence: 99%

See 3 more Smart Citations

Hybrid pulse position modulation/ultrashort light pulse code-division multiple-access systems-part I: fundamental analysis

Kim

Marom

Milstein

et al. 2002

IEEE Trans. Commun.

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In this paper, we propose a hybrid pulse position modulation/ultrashort light pulse code-division multiple-access (PPM/ULP-CDMA) system for ultrafast optical communications. The proposed system employs spectral CDMA encoding/decoding and PPM with very short pulse separation. The statistical properties of the encoded ULP are investigated with a general pulse model, and the performance of the proposed PPM/ULP-CDMA system is investigated. It is shown that we can improve upon the performance of other ULP-CDMA systems, such as those using on-off keying, by employing PPM. It is also shown that we can improve the performance of the proposed system by increasing the effective number of chips, by increasing the number of PPM symbols, and by reducing the ULP duration. The performance analysis shows that the aggregate throughput of the proposed PPM/ULP-CDMA system could be over 1 Tb/s.

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Section: Statistical Properties Of Encoded Ulpsmentioning

confidence: 99%

Section: Performance Analysis and Numerical Evaluationmentioning

confidence: 99%

Section: Performance Analysis and Numerical Evaluationmentioning

confidence: 99%

Section: Performance Analysis and Numerical Evaluationmentioning

confidence: 99%

See 2 more Smart Citations

Hybrid pulse position modulation/ultrashort light pulse code-division multiple-access systems-part I: fundamental analysis

Kim

Marom

Milstein

et al. 2002

IEEE Trans. Commun.

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“…DS-SSMA systems and their performance evaluation techniques have been discussed in [1], [4] and [12]. In [8] and [9] the performance bounds for DS-SSMA systems with complex sig-nature sequences were investigated for the binary PSK data signalling and for M-ary PSK data signalling. The modulators and receivers discussed in these papers use the real processing.…”

Section: Introductionmentioning

confidence: 99%

Quaternary DS-SSMA Communications Employing Generalized Detector over Rayleigh Fading Channels

Tuzlukov

2020

Wseas Transactions on Signal Processing

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This paper deals with an employment of the complex modulators and generalized receivers constructed based on the generalized approach to signal processing (GASP) in noise in quaternary direct-sequence spread-spectrum multiple-access (DS-SSMA) communication systems with complex signature sequences in flat Rayleigh fading. Owing to availability of large sets of complex spreading sequences possessing perfect correlation characteristics, the interest to use the complex spreading sequences in DS-SSMA communication systems has increased. The complex spreading sequences investigated in the present paper are based on the recently introduced orthogonal unified complex Hadamard transform (UCHN) sequences. In the present paper, the complex processing in modulators and generalized receivers is also employed with the purpose to take advantage of the correlation properties of complex signature sequences. We derive the average bit error rate (BER) for quarternary synchronous communications system based on the generalized approach to signal processing in noise first, and then the BER for quaternary asynchronous ones is evaluated using the characteristic function approach. We presented some results based on the Gaussian approximation method for asynchronous communication systems constructed on the basis of the generalized approach to signal processing in noise Computer modeling results demonstrate that the communication systems using UCHT spreading sequences perform generally better than the GOLD sequences and the 4-phase family A sequences. Comparative analysis between the asynchronous communication systems constructed on the basis of the generalized approach to signal processing in noise demonstrates superiority over the asynchronous communication systems employing the correlation receiver.

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DSP-based CDMA Satellite Modem: CNIT/ASI Project

et al. 2001

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Performances of DS/SSMA communications with MPSK signaling and complex signature sequences

Cited by 9 publications

References 12 publications

Hybrid pulse position modulation/ultrashort light pulse code-division multiple-access systems-part I: fundamental analysis

Hybrid pulse position modulation/ultrashort light pulse code-division multiple-access systems-part I: fundamental analysis

Quaternary DS-SSMA Communications Employing Generalized Detector over Rayleigh Fading Channels

DSP-based CDMA Satellite Modem: CNIT/ASI Project

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