Vertical adaptive antenna array for a discrete multitone spread spectrum communications system
First Claim
Patent Images
1. A highly bandwidth-efficient communications method, comprising:
- receiving a received spread signal at a base station having a multi-element antenna array with a first plurality of antenna elements arranged in a spaced vertical direction and a second plurality of antenna elements arranged in a spaced horizontal direction;
said received spread signal comprising a first data signal spread over a plurality of discrete tones in accordance with a remote spreading code assigned to a remote unit for a first time period;
adaptively despreading the signal received at the base station by using first despreading codes that are based on the characteristics of the received signals at the first plurality of antenna elements of said array and perform vertical beam steering; and
adaptively despreading the signal received at the base station by using second despreading codes that are based on the characteristics of the received signals at the second plurality of antenna elements of said array to perform horizontal beam steering.
5 Assignments
0 Petitions
Accused Products
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.
-
Citations
24 Claims
-
1. A highly bandwidth-efficient communications method, comprising:
-
receiving a received spread signal at a base station having a multi-element antenna array with a first plurality of antenna elements arranged in a spaced vertical direction and a second plurality of antenna elements arranged in a spaced horizontal direction;
said received spread signal comprising a first data signal spread over a plurality of discrete tones in accordance with a remote spreading code assigned to a remote unit for a first time period;
adaptively despreading the signal received at the base station by using first despreading codes that are based on the characteristics of the received signals at the first plurality of antenna elements of said array and perform vertical beam steering; and
adaptively despreading the signal received at the base station by using second despreading codes that are based on the characteristics of the received signals at the second plurality of antenna elements of said array to perform horizontal beam steering. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
-
13. A highly bandwidth-efficient communications system. comprising:
-
means for receiving a received spread signal at a base station having a multi-element antenna array with a first plurality of antenna elements arranged in a spaced vertical direction and a second plurality of antenna elements arranged in a spaced horizontal direction;
said received spread signal comprising a first data signal spread over a plurality of discrete tones in accordance with a remote spreading code assigned to a remote unit for a first time period;
means for adaptively despreading the signal received at the base station by using first despreading codes that are based on the characteristics of the received signals at the first plurality of antenna elements of said array and perform vertical beam steering; and
said despreading means adaptively despreading the signal received at the base station by using second despreading codes that are based on the characteristics of the received signals at the second plurality of antenna elements of said array to perform horizontal beam steering. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
-
Specification