Synchronization of front-end and baseband units in wireless communications device by wirelessly transmitting clock signal therebetween
First Claim
1. A wireless device comprising:
- a baseband unit; and
a plurality of front-end units configured to perform diversity combining between signals received at a plurality of antennas from different wireless systems;
the baseband unit and the plurality of front-end units are each provided in individual housings,the baseband unit and the plurality of front-end units are connected to each other by wire to transmit a wired signal,a transmitter provided in any one of the housings, the transmitter being configured to convert a second signal based on a reference clock into a radio signal and wirelessly transmit the radio signal as a clock synchronization signal, andone or more receivers that receive the clock synchronization signal and one or more PLLs that generate a clock synchronized with a reference clock signal which is obtained from the clock synchronization signal provided in one or more individual housings other than the housing having the transmitter provided therein, whereinthe one or more individual housings other than the housing having the transmitter are synchronized to the radio signal.
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Accused Products
Abstract
A wireless device includes a baseband unit and front-end units that are provided in individual housings. The baseband unit and the front-end units are connected to each other by wire. A transmitter for synchronization that converts a signal based on a reference clock into a radio signal and transmits the radio signal as a clock synchronization signal is provided in any one of the housings, and receivers for synchronization that receive the signal for the clock synchronization and PLLs that generate a clock synchronized with a reference clock signal which is obtained from the received clock synchronization signal are provided in the housings other than the housing having the transmitter provided therein. In order to simultaneously process a plurality of wireless devices having different symbol rates, it is preferable to provide the transmitter, the receiver, and the PLL for each reference clock.
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Citations
8 Claims
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1. A wireless device comprising:
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a baseband unit; and a plurality of front-end units configured to perform diversity combining between signals received at a plurality of antennas from different wireless systems; the baseband unit and the plurality of front-end units are each provided in individual housings, the baseband unit and the plurality of front-end units are connected to each other by wire to transmit a wired signal, a transmitter provided in any one of the housings, the transmitter being configured to convert a second signal based on a reference clock into a radio signal and wirelessly transmit the radio signal as a clock synchronization signal, and one or more receivers that receive the clock synchronization signal and one or more PLLs that generate a clock synchronized with a reference clock signal which is obtained from the clock synchronization signal provided in one or more individual housings other than the housing having the transmitter provided therein, wherein the one or more individual housings other than the housing having the transmitter are synchronized to the radio signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification