SYSTEM AND METHOD FOR FREQUENCY OFFSETTING OF INFORMATION COMMUNICATED IN MIMO-BASED WIRELESS NETWORKS
First Claim
1. A method of synchronizing a receiver with a transmitter in a communications system comprising a multiple-input/multiple-output (MIMO) architecture, the architecture comprising a first and a second radio frequency chain, the communications system being configured to transceive at least two signals having a predetermined frequency separation, and the method comprising the steps of:
- a) locking a frequency of the receiver to a first high precision reference frequency; and
b) locking a frequency of the transmitter to a second high precision reference frequency,wherein each of the first and second high precision reference frequency employs a reference crystal having a maximum frequency error of plus-or-minus 5 parts per million.
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Accused Products
Abstract
A communications system includes a multiple-input/multiple-output (MIMO) architecture for high capacity switched mesh networks. The MIMO architecture has a plurality of radio frequency chains. One of the plurality of radio frequency chains is configured to apply a first frequency offset to a base frequency of an output signal to generate a first transmitting frequency; and another of the plurality of radio frequency chains being configured to apply a second frequency offset to the base frequency to generate a second transmitting frequency. The system uses the carrier frequency offset to lock the clock of the master subsystem to the clock of the slave subsystem, thereby enabling bandwidth expansion to be employed on the MIMO data streams.
15 Citations
1 Claim
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1. A method of synchronizing a receiver with a transmitter in a communications system comprising a multiple-input/multiple-output (MIMO) architecture, the architecture comprising a first and a second radio frequency chain, the communications system being configured to transceive at least two signals having a predetermined frequency separation, and the method comprising the steps of:
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a) locking a frequency of the receiver to a first high precision reference frequency; and b) locking a frequency of the transmitter to a second high precision reference frequency, wherein each of the first and second high precision reference frequency employs a reference crystal having a maximum frequency error of plus-or-minus 5 parts per million.
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Specification