2003 · 88 citations · 8 references
Array ProcessingEngineeringSensor ArrayNew TypeSingle Rf ChannelAntennaSmart AntennasDigital BeamformingSmart Antenna SystemSmart AntennaComputational ElectromagneticsDistributed Antenna ArchitectureBeamformingAntenna ArraysSignal ProcessingAdaptive Digital BeamformingRf Subsystem
The paper proposes a new smart antenna array receiver that uses adaptive beamforming. The system employs a single RF channel that sequentially samples the array elements at a rate above the signal bandwidth, reconstructs the signal with low‑pass filtering, and is implemented in a four‑element prototype with a novel array‑feed network, validated by link tests. The SMILE scheme reduces RF hardware by a factor of N for an N‑element array, dramatically lowering system complexity.
A new type of smart antenna array receiver with adaptive beamforming is proposed. The novel system offers a drastic reduction in hardware requirements for the smart antenna system through the use of a new Spatial Multiplexing of Local Elements (SMILE) scheme. In this scheme, a single element of the array is sequentially connected to signal processing circuitry in order to sample the incoming modulated carrier. The sampling rate is higher than the signal bandwidth so that the information of the original signal can be fully restored in the post stages using low-pass filters. This system offers an N times reduction in RF hardware for an N-element array. A four-element prototype is built. System principles, SNR, advantages, and hardware, including a new type of array feed network, are discussed. The system performance is validated through a link test with digitally modulated data.
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Digital beamforming antennas - An introduction
H. Steyskal · Microwave journal · 1987 · 120 citations
Digital beamforming for radar systems
H. Steyskal, John F. Rose · Microwave journal · 1989 · 58 citations