Performance analysis of correlation-based communication schemes utilizing chaos

Abstract

Using chaotic signals in spread-spectrum communications has a few clear advantages over traditional approaches. Chaotic signals are nonperiodic, wide-band, and more difficult to predict, reconstruct, and characterize than periodic carriers. These properties of chaotic signals make it more difficult to intercept and decode the information modulated upon them. However, many suggested chaos-based communication schemes do not provide processing gain, a feature highly desirable in spread-spectrum communication schemes. In this paper, we suggest two communication schemes that provide a processing gain. The performance of these and of the earlier proposed differential chaos shift keying is studied analytically and numerically for discrete time implementations. It is shown that, when performance is characterized by the dependence of bit error rate on 0 , the increase of the spreading sequence length beyond a certain point degrades the performance. For a given 0 , there is a length of the spreading sequence that minimizes the bit error rate.

BER Performance Evaluation of Boss Map According to Delay Time in CDSK Modulation Scheme and Chaos Transceiver

“…Keying) 방식의 경우에는 카오스 신호가 레퍼런스 신 호로 가산된 후에 전송되기 때문에 많은 자기 간섭 신 호를 가지며, 이로 인해 BER 성능이 나쁘게 평가된다 [4] . [5] .…”

Design of Enhanced Differential Chaos Shift Keying Scheme

“…This doubles data rates but yields into much intrasignal interference which affects the BER destructively at low spreading factor. Another design for highly efficient DCSK is called code-shifted DCSK (CS-DCSK) [7]. The scheme uses Walsh code to separate the chaotic samples instead of using RF delay line.…”

Noncoherent Correlation-Based Communication Systems Choosing Different Chaotic Maps

“…The differential chaos shift keying (DCSK) [1] and the optimal receiver [2] are well known as a typical noncoherent system. In addition, the correlation delay shift keying (CDSK) [3] similar to the DCSK scheme is also regarded.…”