A multiple sidelobe canceller using tapped delay line with Gram-Schmidt processing

Hirata, Kazufumi; Mano, Seiji

doi:10.1109/tencon.1996.608454

Cited by 2 publications

(3 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Fig.7(a) shows the structure of the adaptive filter in the conventional GSC that has P channels (where N P  ), and Fig.7(b) shows the structure of the proposed beamformer that has one channel followed by a tapped delay line (TDL). The use of a TDL in adaptive beamforming topic has been successfully applied to reduce the number of auxiliary channels to only one channel, while suppressing multiple interfering signals [15,16]. In Fig.7(b), ) (k d is the received signal of the upper channel, …”

Section: The Proposed Approachmentioning

confidence: 99%

Robust Adaptive Beamforming using Woodward-Lawson Array Design Method

Mohammed¹

2017

IJCA

View full text Add to dashboard Cite

In practice, the knowledge of the desired steering vector can be imprecise due to estimation errors in the direction of arrival (DOA) of the desired signal or imperfect array calibration. In these situations, the performances of the conventional adaptive beamformers are known to degrade substantially. In this paper, an effective method for designing a robust adaptive beamforming is presented. This method is based on Woodward-Lawson array design method, where the main beamformer in the upper channel is designed to form a main lobe with high gain in the direction of desired signal while the blocking structure in the lower channel is designed to form a wide and deep null toward and around the direction of desired signal. By generating this wide null, the proposed method provides robustness against arbitrary mismatches in the desired signal steering vector. Simulation results in ideal situations (where the desired signal steering vector is known exactly) and in more realistic situations with signal steering vector errors are presented to illustrate the performance of the proposed method.

show abstract

Section: The Proposed Approachmentioning

confidence: 99%

Robust Adaptive Beamforming using Woodward-Lawson Array Design Method

Mohammed¹

2017

IJCA

View full text Add to dashboard Cite

show abstract

“…From the output of the first stage adaptive filter with a high SINR, the timing of the UWs is estimated to extract only the signal in the period containing the UWs. By estimation of the frequency offset (10) (11) (12) (13) (14) error, the reference signal is corrected and then the weights are computed. In this manner, the UW timing and frequency offset are estimated from the signals with a high SINR.…”

Section: Adaptive Array Antenna With Slc-type Preprocessormentioning

confidence: 99%

“…In this paper, in order to handle these problems, an adaptive array antenna with a two-stage configuration is proposed, in which an adaptive filter processor with the same form as the SLC (Sidelobe Canceler) [9,10] is added as a preprocessor for the conventional adaptive array antenna. This adaptive filter processing with the same form as the SLC is called an SLC-type preprocessor in this paper.…”

Section: Introductionmentioning

confidence: 99%

An adaptive array antenna with SLC‐type preprocessor

Hirata¹,

Sekiguchi²,

Fujisaka³

2002

Electron. Comm. Jpn. Pt. I

View full text Add to dashboard Cite

SUMMARYRecently, with rapid proliferation of mobile communication, there has arisen a need for adaptive array antennas that can automatically control the antenna radiation pattern. In adaptive array antennas based on the MMSE (Minimization of Mean Square Error) method, a reference signal with a high correlation with the desired wave is required in order to distinguish the desired wave and the interference waves. The unique word (UW) employed for synchronization in mobile communication is a known signal sequence and can be used as a reference signal. However, it is necessary to accurately estimate the timing at which the UW is contained in the communication signal. The estimation error in the case of strong interference can be a cause of deterioration of the interference suppression capability. Also, if the UW is contained in both the interference and the desired wave at the same timing, the desired wave cannot be recognized and the interference wave cannot be suppressed. In this paper, an adaptive array antenna with a two-stage configuration using a preprocessing of an SLC (sidelobe canceler) is proposed so that the effect of the interference prior to the start of communication is avoided. By the simulation, it is confirmed that only the interference wave can be suppressed effectively even if the UWs contained in the interference and the desired wave are in synchronization.

show abstract

A multiple sidelobe canceller using tapped delay line with Gram-Schmidt processing

Cited by 2 publications

References 2 publications

Robust Adaptive Beamforming using Woodward-Lawson Array Design Method

Robust Adaptive Beamforming using Woodward-Lawson Array Design Method

An adaptive array antenna with SLC‐type preprocessor

Contact Info

Product

Resources

About