Blind receivers for MSK signals transmitted through shallow water

Weber, R.; Waldhorst, A.; Schulz, Florian; Böhme, J.F.

doi:10.1109/oceans.2001.968337

Cited by 8 publications

(3 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…CPM has not been widely used in UWA communication. Weber discussed the feasibility of blind equalization for MSK UWA communication [ 20 ]. Vadde [ 21 ] and Liu [ 22 ] studied MSK and GMSK signals for UWA communication, respectively, and employed the virtual time-reversal mirror to suppress multipath interference.…”

Section: Introductionmentioning

confidence: 99%

Prefiltered Single-Carrier Frequency-Domain Equalization for Binary CPM over Shallow Water Acoustic Channel

Han

Jia

Guo

et al. 2022

Sensors

View full text Add to dashboard Cite

The continuous phase modulation (CPM) technique is an excellent solution for underwater acoustic (UWA) channels with limited bandwidth and high propagation attenuation. However, the severe intersymbol interference is a big problem for the algorithm applying in shallow water. To solve this problem, an algorithm for prefiltered single-carrier frequency-domain equalization (PF-SCFDE) is presented in this paper. The regular whitening filter is replaced by a prefilter in the proposed algorithm. The output information sequence of this prefilter contains the forward information. To improve the performance, the output of the equalizer, combined with the forward information, is used to make the maximum likelihood estimation. The simulation results with minimum-shift keying and Gaussian-filtered minimum-shift keying signals over shallow water acoustic channels with low root mean square delay spread demonstrate that PF-SCFDE outperformed the traditional single-carrier frequency-domain equalization (SCFDE) by approximately 1 dB under a bit error rate (BER) of 10−4. A shallow sea trial has demonstrated the effectiveness of PF-SCFDE; PF-SCFDE had a reduction in BER of 18.35% as compared to the traditional SCFDE.

show abstract

Section: Introductionmentioning

confidence: 99%

Prefiltered Single-Carrier Frequency-Domain Equalization for Binary CPM over Shallow Water Acoustic Channel

Han

Jia

Guo

et al. 2022

Sensors

View full text Add to dashboard Cite

show abstract

“…The proposed multichannel fractionally-spaced adaptive equalizer together with subsequent phase control is obviously able to reduce an initial BER of above 20% to values well below 1% without any prior training. Furthermore, the convergence towards these low BER values is very fast, especially when compared to the widely used CMA [14]. This is also reflected by the mean-square error (MSE) between the signals prior and after the slicer, which is a measure for the residual ISI.…”

Section: Resultsmentioning

confidence: 99%

“…However, as the number of equalizer taps shall be finite, the equality requirement in (8) Observing that under Theorem 1, Itl$(ItltC;vX$)t 3ct C; v = I, it should be evident that solving the least-squares problem (1 1) together with subsequent normalization (14) is equivalent to one step of the iteration (8) to (9).…”

Section: [ G I L N = ( [ S L H + N -L I ] N ) M L ( ( [ S L H + N -mentioning

confidence: 99%

Adaptive super-exponential methods for blind multichannel equalization

Weber

Bohme

Sensor Array and Multichannel Signal Processing Workshop Proceedings, 2002

Self Cite

View full text Add to dashboard Cite

An adaptive super-exponential algorithm for multichannel fractionally-spaced blind equalization is proposed. In the noise-free case, oversampling the received signal in space or time leads to a rank-deficient covariance matrix of the corresponding vector process. This seems to be the major obstacle towards a multichannel adaptive super-exponential algorithm. In the absence of additive noise, the optimal multichannel equalizer setting can also be found as the solution of a suitably chosen quadratic cost function. In the presence of a moderate amount of noise, minimization of the same cost function should result in an equalizer setting close to the optimal one. The optimization, however, can now be performed recursively using a stabilized RLS algorithm. Experimental results with underwater acoustic communication data demonstrate the good performance of the suggested method.

show abstract

An $l_{0}$-Norm Blind Decision Feedback Equalization with Adaptive Zero Attractor for Sparse Underwater Acoustic Channel

Jiang

Wang

et al. 2021

2021 International Wireless Communications and Mobile Computing (IWCMC)

View full text Add to dashboard Cite

Blind receivers for MSK signals transmitted through shallow water

Cited by 8 publications

References 20 publications

Prefiltered Single-Carrier Frequency-Domain Equalization for Binary CPM over Shallow Water Acoustic Channel

Prefiltered Single-Carrier Frequency-Domain Equalization for Binary CPM over Shallow Water Acoustic Channel

Adaptive super-exponential methods for blind multichannel equalization

An $l_{0}$-Norm Blind Decision Feedback Equalization with Adaptive Zero Attractor for Sparse Underwater Acoustic Channel

Contact Info

Product

Resources

About