Communication system using OFDM for one direction and DSSS for another direction
First Claim
Patent Images
1. A method for communicating with at least one subscriber, the method comprising:
- transmitting orthogonal frequency domain multiplexing (OFDM) signal to the at least one subscriber; and
receiving direct-sequence spread spectrum (DSSS) signals from the at least one subscriber in response to the OFDM signals.
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Abstract
A method and apparatus for wireless communication are described. In one embodiment, a method for communicating with a subscriber comprises transmitting orthogonal frequency domain multiplexing (OFDM) signals to the subscriber, and receiving direct-sequence spread spectrum (DSSS) signals from the subscriber.
340 Citations
54 Claims
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1. A method for communicating with at least one subscriber, the method comprising:
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transmitting orthogonal frequency domain multiplexing (OFDM) signal to the at least one subscriber; and
receiving direct-sequence spread spectrum (DSSS) signals from the at least one subscriber in response to the OFDM signals. - View Dependent Claims (2)
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3. A method for communicating with a base station, the method comprising:
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receiving orthogonal frequency domain multiplexing (OFDM) signals from the base station; and
transmitting direct-sequence spread spectrum (DSSS) signals to the base station in response to the OFDM signals. - View Dependent Claims (4)
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5. A system comprising:
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a subscriber having a DSSS transmitter, an OFDM receiver, a first antenna coupled to the DSSS transmitter and the OFDM receiver; and
a base station communicably coupled with the subscriber, the base station having a DSSS receiver, an OFDM transmitter, a second antenna coup ted to the DSSS receiver and the OFDM transmitter, wherein the OFDM receiver of the subscriber is to receive OFDM signals from the OFDM transmitter of the base station, wherein the DSSS transmitter of the subscriber is to transmit DSSS signals to the base station in response to the received OFDM signals, and wherein the DSSS signals are received by the DSSS receiver of the base station. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A communication network comprising:
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first and second systems, each of the first and second systems including a DSSS transmitter, a DSSS receiver, and an antenna coupled to the DSSS transmitter and DSSS receiver, wherein the first system comprises an OFDM transmitter coupled to its antenna and the second system comprises an OFDM receiver coupled to its antenna wherein said second system transmits a DSSS signal using said DSSS transmitter in response to an OFDM signal received by said OFDM receiver. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54)
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Specification