The Differential CMA Adaptive Array Antenna Using an Eigen-Beamspace System
スポンサーリンク
概要
- 論文の詳細を見る
This paper addresses approaches to enhancement of performance of the CMA (Constant Modulus Algorithm) adaptive array antenna in multipath environments that characterize the mobile radio communications. The cost function of the CMA reveals that it has an AGC (Automatic Gain Control) procedure of holding the array output voltage at a constant value. Therefore, if the output voltage by the initial weights is different from the object value, then the CMA may suffer from slow convergence because suppression of the multipath waves is delayed by the AGC behavior. Our objective is to improve the convergence characteristics by adopting the differential CMA for the adaptive array algorithm. First, the basic performance of the differential CMA is clarified via computer simulation. Next, the differential CMA is incorporated into the eigen-beamspace system in which the eigenvectors of the correlation matrix of array inputs are used in the BFN (Beam Forming Network). This BFN creates the optimum orthogonal multibeams for radio environments and works helpfully as a preprocessor of the differential CMA. The computer simulation results have demonstrated that the differential CMA with the eigen-beamspace system has much better convergence characteristics than the conventional CMA with the element space system. Furthermore, a modified algorithm is introduced which gives the stable array output voltages after convergence, and it is confirmed that the algorithm can carry out more successful adaptation even if the radio environments are changed abruptly.
- 社団法人電子情報通信学会の論文
- 1995-11-25
著者
-
Inagaki N
Nagoya Inst. Technol. Nagoya Jpn
-
Nishimori K
Ntt Corp. Yokosuka‐shi Jpn
-
Inagaki Naoki
Nagoya Institute Of Technology
-
Inagaki N
Nagoya Inst. Technol. Nagoya‐shi Jpn
-
Nishimori Kentaro
Nagoya Institute of Technology
-
Kikuma Nobuyoshi
Nagoya Institute of Technology
-
Kikuma N
Nagoya Inst. Technol. Nagoya‐shi Jpn
関連論文
- A Novel Configuration for Realizing Automatic Calibration of Adaptive Array Using Dispersed SPDT Switches for TDD Systems(Special Issue on Innovation in Antennas and Propagation for Expanding Radio Systems)
- Adaptive Array for Reducing High-Power CCI on Asynchronous TDD Systems (Special Issue on Adaptive Array Antenna Techniques for Advanced Wireless Communications)
- Two Base Station Configuration Using an Adaptive Array at Elevated Locations for Microcell Systems (Special Issue on Personal, Indoor and Mobile Radio Communications)
- Adaptive Array Employing Eigenvector Beam of Maximum Eigenvalue and Fractionally-Spaced TDL with Real Tap (Special Issue on Personal, Indoor and Mobile Radio Communications)
- An Efficient ICT Method for Analysis of Co-planar Dipole Antenna Arrays of Arbitrary Lengths
- An Improved Circuit Theory for the Analysis of Longer Co-planar Dipole Antennas
- ANALYSIS OF A SOLID CYLINDRICAL ANTENNA WITH FINITE GAP EXCITATION
- Hallen Type Integral Equation for Cylindrical Antennas with Finite Gap Excitation
- The Differential CMA Adaptive Array Antenna Using an Eigen-Beamspace System
- An Estimation Method of Poynting Vector with Near-Magnetic-Field Measurement
- Broadband Planar Antenna Combining Monopole Element with Electromagnetic Bandgap
- Design and Optimization of Millimeter-Wave Microstrip-to-Waveguide Transition Operating over Broad Frequency Bandwidth(Microwaves, Millimeter-Waves)
- Adaptive Antennas
- High-Resolution Techniques in Signal Processing Antennas
- A Novel Adaptive Array Utilizing Frequency Characteristics of Multi-Carrier Signals
- The effect of methanolic extract from Corydalis Tuber on cytokine production and allergic reactions in experimental animals
- Adaptive Base Station Antenna Configuration Suitable for Street Microcells Considering Propagation Environment(Regurlar Section)
- Iterative DOA Estimation Using Subspace Tracking Methods and Adaptive Beamforming(Recent Progress in Antennas and Propagation Researches : Selected Papers Translated from the IEICE Transactions on Communications (Japanese Edition))
- A New Scheme to Avoid Null Zone for HF-Band RFID with Diversity Combining of Loop Antennas
- Control of Power Dividing Ratio in Four-Way Power Divider for Feeding Microstrip Comb-Line Antenna
- Narrow-Wall-Slotted Hollow-Waveguide Array Antenna Using Partially Parallel Feeding System in Millimeter-Wave Band
- Narrow-Wall-Connected Microstrip-to-Waveguide Transition Using V-Shaped Patch Element in Millimeter-Wave Band
- Transition from Waveguide to Two Microstrip Lines with Slot Radiators in the Millimeter-Wave Band
- Channel Capacity Improvement in Short-Range MIMO Using Side and Back Reflectors
- Millimeter-wave Planar Broadband Antennas for Array Antenna Elements and RF Packages(2012 Korea-Japan Antennas and Propagation Workshop)
- Location Estimation of Multiple Near-Field Broadband Sources by Combined Use of DOA-Matrix Method and SAGE Algorithm in Array Antenna Processing(2012 Korea-Japan Antennas and Propagation Workshop)
- FOREWORD
- Millimeter-Wave Microstrip-Line-Fed Broadband Waveguide Aperture Antennas