Vertical adaptive antenna array for a discrete multitone spread spectrum communication system
First Claim
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1. A communication apparatus, comprising:
- antenna means for wirelessly receiving a signal, wherein the antenna means includes first antenna element means for vertical beam steering, and second antenna element means for horizontal beam steering,receiver means, coupled to the antenna means, for receiving a spread signal, wherein the spread spectrum signal is a data signal spread over multiple discrete tones according to a remote spreading code of a remote station;
wherein the receiver means includes means for despreading the received signal under a first despreading code based on characteristics of the received signal at the first antenna element means, and means for despreading the signal received by using a second despreading code based on characteristics of the received signal at the second antenna element means.
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Abstract
Two or more antenna elements are arranged in the vertical direction to give vertical spatial adaptivity to a wireless discrete multitone spread spectrum communications system. The system is based on a combination of Discrete Multitone Spread Spectrum (DMT-SS) and multi-element adaptive antenna array technologies. This enables the automatic positioning of a beam in the vertical direction to position nulls where interferers are located on the same azimuth but are separated in elevation.
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Citations
20 Claims
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1. A communication apparatus, comprising:
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antenna means for wirelessly receiving a signal, wherein the antenna means includes first antenna element means for vertical beam steering, and second antenna element means for horizontal beam steering, receiver means, coupled to the antenna means, for receiving a spread signal, wherein the spread spectrum signal is a data signal spread over multiple discrete tones according to a remote spreading code of a remote station; wherein the receiver means includes means for despreading the received signal under a first despreading code based on characteristics of the received signal at the first antenna element means, and means for despreading the signal received by using a second despreading code based on characteristics of the received signal at the second antenna element means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 17)
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11. A communications apparatus, comprising:
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a multi-element antenna array including a first group of antenna elements arranged in a vertical direction and a second group of antenna elements arranged in a horizontal direction, wherein vertical and horizontal displacement of the first and second groups of elements at least in part perform vertical and horizontal beam steering, all respectively; and a receiver, coupled to the antenna, and configured for receiving a spread signal, the spread signal being a data signal spread over multiple discrete tones in accordance with a spreading code associated with a transmitter; wherein the receiver includes despreading circuitry configured to despread the received signal by way of a first despreading code that is based at least in part on characteristics of the received signals at the first group of antenna elements, and wherein the despreading circuitry is further configured to adaptively despread the signal received by using a second despreading code based on characteristics of the received signals at the second group of antenna elements. - View Dependent Claims (12, 13, 14, 15, 16, 18, 19, 20)
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Specification