Hybrid radio transceiver for wireless networks
First Claim
1. A hybrid radio transceiver for wireless networks comprising:
- a controller connected to a network and adapted to exchange a plurality of transmit and receive signals with the network;
a wideband receiver, connected to the controller and adapted to exchange the plurality of receive signals with the controller;
a plurality of narrowband transmitters, each comprising a narrowband exciter connected to the controller and adapted to exchange the plurality of transmit signals with the controller;
a duplexer, connected to the wideband receiver and adapted to exchange the plurality of transmit and receive signals with the wideband receiver and the plurality of narrowband transmitters; and
an antenna, connected to the duplexer and adapted to exchange the plurality of transmit and receive signals with the duplexer.
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Accused Products
Abstract
A hybrid radio transceiver that includes one wideband receiver and multiple narrowband transmitters for use in wireless networks, having the advantage of providing lower cost but performance that is comparable to a transceiver that uses multiple narrowband transceivers. The hybrid radio transceiver provides software defined parameters to achieve flexibility in modulation and protocol types. The hybrid radio transceiver is adaptable to both capacity intensive and wide coverage applications, and supports communication links that are imbalanced in terms of data transmission capacity. The wideband receiver, of the hybrid radio transceiver, converts the RF to an IF which is digitized and passed to digital signal processors for tuning, filtering, demodulation and protocol control with eventual interface to the network. The narrowband transmitters, of the hybrid radio transceiver, use a variety of processes which include modulation in a narrowband exciter which feeds a narrowband power amplifier then combination of the signals before the antenna, or use of a multi-carrier power amplifier and low power combiner.
91 Citations
7 Claims
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1. A hybrid radio transceiver for wireless networks comprising:
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a controller connected to a network and adapted to exchange a plurality of transmit and receive signals with the network; a wideband receiver, connected to the controller and adapted to exchange the plurality of receive signals with the controller; a plurality of narrowband transmitters, each comprising a narrowband exciter connected to the controller and adapted to exchange the plurality of transmit signals with the controller; a duplexer, connected to the wideband receiver and adapted to exchange the plurality of transmit and receive signals with the wideband receiver and the plurality of narrowband transmitters; and an antenna, connected to the duplexer and adapted to exchange the plurality of transmit and receive signals with the duplexer. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for modulating a transmit signal in a narrowband exciter in the hybrid radio transceiver for wireless networks comprising:
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passing digital data from a controller to a digital signal processor for modulation; creating digital phase and amplitude components by action of the digital signal processor; passing the digital phase and amplitude components to a digital-to-analog converter and anti-aliasing filter; converting the digital phase and amplitude components into analog phase and modulation components by action of the digital-to-analog converter and anti-aliasing filter; applying the analog phase and amplitude components to a direct quadrature modulator circuit; and outputting an analog modulated signal to the transmitter antenna for subsequent wireless transmission.
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Specification