Chaotic binary sequences for efficient wireless multipath channel estimation

Shanmugam, Surendran K.; Leung, Henry

doi:10.1109/vetecf.2004.1400212

Cited by 4 publications

(4 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It exhibits exponential divergence from adjacent starting points leading to unpredictability due to finite precision of the initial conditions. A chaotic map is a polynomial mapping which is a good example of how complex, chaotic behaviour can be obtained from very simple non-linear dynamical equations [14], [16], [13], [15]. A particularly interesting candidate for a chaotic sequence generator is the family of Chebyschev polynomials, whose nonlinear properties are amenable to rigorous mathematical analysis [14].…”

Section: B Chaotic Communicationsmentioning

confidence: 99%

Chaos-based modulation for blind and coherent signal detection in non-cooperative TDD cellular networks with large antenna arrays

Morales

Roy

2014

2014 International Conference on Computing, Networking and Communications (ICNC)

View full text Add to dashboard Cite

Inter-cell interference is a challenging issue in noncooperative time-division duplex (TDD) cellular systems with large antenna arrays. In this document we propose two signal detection methods based on Differential chaos-shift-keying (DCSK) modulation that robustly detect individual users in congested networks. Blind signal detection at the BTS is an appropriate technique in systems where channel state information (CSI) in not accurate. A detection technique based in DCSK modulation is presented, this method detects individual users in a cell without knowledge of the channel coefficients. Recently, a training scheme for non-cooperative TDD cellular systems has been proposed in which the transmission of pilots is shifted in time from one cell to the next, avoiding overlap. This method cancels out interference from inter-cell users during the training period and channel state information may be retrieved. Therefore, a DCSK-based coherent detection technique at the BTS is proposed in which a large number of individual users within a loaded cellular system can be detected with low bit-error-rate (BER) levels. Finally, Mary DCSK modulation is discussed. With this technique, b > 1 bits can be modulated in a single transmission as opposed to conventional DCSK. The M-ary DCSK scheme is tested in Multiuser MIMO systems to increase the spectral efficiency of the chaotic system.

show abstract

Section: B Chaotic Communicationsmentioning

confidence: 99%

Chaos-based modulation for blind and coherent signal detection in non-cooperative TDD cellular networks with large antenna arrays

Morales

Roy

2014

2014 International Conference on Computing, Networking and Communications (ICNC)

View full text Add to dashboard Cite

show abstract

“…It exhibits exponential divergence from adjacent starting points leading to unpredictability due to finite precision of the initial conditions. A chaotic map is a polynomial mapping which is a good example of how complex, chaotic behaviour can be obtained from very simple non-linear dynamical equations [13,16,15,14]. A particularly interesting candidate for a chaotic sequences generator is the family of Chebyschev polynomials, whose nonlinear properties are amenable to rigorous mathematical analysis [13].…”

Section: B Chaotic Sequencementioning

confidence: 99%

Training sequence design for robust joint detection and channel estimation over rank-deficient MIMO links

Morales

Roy

2012

2012 International Conference on Computing, Networking and Communications (ICNC)

View full text Add to dashboard Cite

In this paper, we present a study of optimal training sequences for robust joint channel estimation and signal detection. Particularly, we study the case of virtual MIMO links, where there are more co-channel signals M than receive antennas N, i.e., N < M. A training sequence based on the one-dimensional chaotic Chebyshev map is presented herein. This sequence delivers robust performance in terms of Bit Error rate (BER), Normalized Mean-Squared-Error (NMSE) of the estimation and computation complexity. The proposed sequence exhibits an optimal performance by spanning only a minimal number of training symbols, i.e., L = M. The proposed chaotic-based training sequence performs adequatly on both i.i.d. and correlated Rayleigh Fading Channels without the need for a priori statistics of the channel.

show abstract

“…The CPSLR degradation observed in proposed S100 codes is inherent to its construction. Alternatively, one can utilize evolutionary techniques for the multiple-objective code optimization encountered in CS100 code design [27].…”

mentioning

confidence: 99%

Design of Short Synchronization Codes for Use in Future GNSS System

Shanmugam

Mongrédien

Nielsen

et al. 2008

International Journal of Navigation and Observation

View full text Add to dashboard Cite

The prolific growth in civilian GNSS market initiated the modernization of GPS and the GLONASS systems in addition to the potential deployment of Galileo and Compass GNSS system. The modernization efforts include numerous signal structure innovations to ensure better performances over legacy GNSS system. The adoption of secondary short synchronization codes is one among these innovations that play an important role in spectral separation, bit synchronization, and narrowband interference protection. In this paper, we present a short synchronization code design based on the optimization of judiciously selected performance criteria. The new synchronization codes were obtained for lengths up to 30 bits through exhaustive search and are characterized by optimal periodic correlation. More importantly, the presence of better synchronization codes over standardized GPS and Galileo codes corroborates the benefits and the need for short synchronization code design.

show abstract

Chaotic binary sequences for efficient wireless multipath channel estimation

Cited by 4 publications

References 11 publications

Chaos-based modulation for blind and coherent signal detection in non-cooperative TDD cellular networks with large antenna arrays

Chaos-based modulation for blind and coherent signal detection in non-cooperative TDD cellular networks with large antenna arrays

Training sequence design for robust joint detection and channel estimation over rank-deficient MIMO links

Design of Short Synchronization Codes for Use in Future GNSS System

Contact Info

Product

Resources

About