Blind matched filter receiver

Matched filter receiver (MFR) of Forney in the presence of intersymbol interference (ISI) and additive white Gaussian noise is investigated from a blind perspective, which includes blind maximum likelihood sequence detection, blind decision feedback equalization and linear blind equalization. Various realizations of the blind MFR are discussed. In a blind MFR, the channel can be easily estimated using a simple algorithm such as the constant-modulus algorithm (CMA). In this sense, the CMA can be used to estimate the channel directly without complicated matrix decomposition techniques. Zero forcing and minimum mean-square estimation based designs of the blind MFR are explored. Channel estimation using the CMA deteriorates in the presence of noise. A new method to tackle this problem is developed and shown to have satisfactory behavior in low signal-to-noise ratios. Tracking performance of the blind MFR is found to be acceptable in representative Rayleigh fading channels of mobile communication.


Blind channel estimation via combining autocorrelation and blind phase estimation
Baykal, Buyurman (Institute of Electrical and Electronics Engineers (IEEE), 2004-06-01)
Symbol spaced blind channel estimation methods are presented which can essentially use the results of any existing blind equalization method to provide a blind channel estimate of the channel. Blind equalizer's task is reduced to only phase equalization (or identification) as the channel autocorrelation is used to obtain the amplitude response of the channel. Hence, when coupled with simple algorithms such as the constant modulus algorithm (CMA) these methods at baud rate processing provide alternatives to ...
Matched filtering for CMA-based blind channel estimation
Baykal, Buyurman (Institution of Engineering and Technology (IET), 2003-08-21)
A novel blind matched filter receiver (MFR) is presented. The development depends on rearrangement of the optimum MFR and the use of the constant modulus algorithm (CMA) to estimate the matched filter. Using the blind MFR and CMA together, a novel blind channel estimation technique is presented.
Triple stub circuit topology as simultaneous insertion phase, amplitude and impedance control circuit for phased array applications
Unlu, M.; Demir, Şimşek; Akın, Tayfun (Institution of Engineering and Technology (IET), 2012-10-23)
This study shows that the well-known triple stub circuit topology can also be used for controlling the insertion phase and amplitude of a given signal simultaneously, as well as preserving its impedance transformation ability. The triple stub circuit topology, which is nothing but an extension of the conventional double stub loaded-line phase shifter, results in one more degree of freedom to its solution when it is solved for its insertion phase. This additional degree of freedom not only brings the impedan...
Reflection Phase Characterization of Curved High Impedance Surfaces
Durgun, Ahmet Cemal; Birtcher, Craig R. (Institute of Electrical and Electronics Engineers (IEEE), 2013-12-01)
Reflection phase characteristics of cylindrically curved high impedance surfaces (HISs) are examined. Due to the non-periodicity of the problem, full wave solutions can be time consuming. To overcome this problem, an approximate semi-analytical method, which assumes a homogenized model for the curved HIS, is developed. The model parameters can be extracted from the reflection properties of the flat HIS. For the cases where only Floquet currents are excited, the reflection phase diagram of a curved HIS is in...
Dynamic range enhancements in radio receivers by means of frequency retranslation
Nesimoglu, T.; Charalampopoulos, Z.; Warr, P. A.; Beach, M. A. (Institution of Engineering and Technology (IET), 2012-03-20)
In this study, a receiver architecture is presented that may be used for linearisation or for large signal interference suppression. In linearisation mode, an error signal that consists of intermodulation distortion products is obtained and used for predistorting the receiver. Experimental results demonstrate > 16 dB improvement of third-order input intercept point when used in a superheterodyne topology. When used in a direct conversion receiver topology, 7-dB improvement of second-order input intercept po...
Citation Formats
B. Baykal, “Blind matched filter receiver,” IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS, pp. 379–390, 2004, Accessed: 00, 2020. [Online]. Available: