Abstract: A base station and the customer premises equipment (CPE) transceivers are configured to use a single master clock for all frequency conversions. The modem of each CPE has a clock output and that output is connected to the upconverter in the transceiver uplink or to both the upconverter and the downconverter as required.

Abstract: A base station and the customer premises equipment (CPE) transceivers are configured to use a single master clock for all frequency conversions. The modem of each CPE has a clock output and that output is connected to the upconverter in the transceiver uplink or to both the upconverter and the downconverter as required.

Abstract: There is provided a duplexer having first, second and third ports and adapted for connection between an antenna and uplink and downlink, respectively, in a full duplex communication system. The duplexer has first and second quarter wave transformers connected between the first and third and between the first and second ports, respectively. The duplexer has a balancing resistor connected between the third port and the output of the second transformer. The duplexer has a filter circuit connected between the output of the second transformer and the second port.

Abstract: A wireless communication system has a base station operative to communicate wirelessly with a plurality of customer devices. The base station has a circulator with a first port connected to one or more signal transmission devices, a second port that is connected to one or more antennas, and a third port that is connected to one or more signal reception devices. The circulator communicates transmission signals from the one or more signal transmission devices to the one or more antennas, and communicates received signals from the one or more antennas to the one or more signal reception devices. The plurality of customers devices have cancellation/separation duplexers or circulators.

Abstract: There is provided a duplexer having first, second and third ports and adapted for connection between an antenna and uplink and downlink, respectively, in a full duplex communication system. The duplexer has first and second quarter wave transformers connected between the first and third and between the first and second ports, respectively. The duplexer has a balancing resistor connected between the third port and the output of the second transformer. The duplexer has a filter circuit connected between the output of the second transformer and the second port.

Abstract: A cable system is configured for eliminating ingress noise by configuring set top boxes to transmit at a high frequency at which the noise is absent, by converting those high frequency signals to low frequency signals via a converter at the feeder line end, and by reconverting the low frequency signals to high frequency signals via a converter connecting the feeder line to the trunk. The end of the trunk is connected directly back to the node so that the signals from the feeder line travel in the “forward” direction back to the node and thus to the cable headend.