A method and apparatus for supplying a timing signal from a central unit to at least one radio head connected to the central unit via a communications link. The central unit transmits a downlink signal to the radio head(s) via the communications link based on a transmit clock supplied via a clock selector within the central unit. In a first mode, the clock selector supplies a clock signal derived from a network downlink signal received at the central unit, such as from a MSC, as the transmit clock. However, in response to the loss of the network downlink signal, a second mode is entered wherein the clock selector instead supplies a clock signal derived from an uplink clock signal generated by the radio head, such as by a PLL therein, as the transmit clock. Thus, the central unit may supply a reference clock signal to the radio head even when the network downlink signal is temporarily lost.

A method and apparatus for supplying a timing signal from a central unit to at least one radio head connected to the central unit via a communications link. An external signal, typically generated by a MSC, is received at a first framer of the central unit and the first framer generates a reference clock signal based thereon. This reference clock signal is used as the transmit clock for a second framer, known as the radio head framer. The radio head framer transmits a radio head downlink signal to the radio head(s) via the communications link. The radio head downlink signal typically includes payload information and an associated timing reference signal, typically in the form of an embedded clock signal. This timing reference signal of the downlink is based on the reference clock signal from the first framer, rather than being based on a clock signal from an oscillator within the central unit. The transceivers within the radio head(s) may then control their RF transmissions using the timing reference signal from the radio head framer of the central unit. Accordingly, the radio head(s) are provided with a timing reference signal that is based relatively directly on the signal from the MSC.

The present invention reduces the number of tuners required by an adaptive array that reduces interference in the selected channel of the received desired signal with signals present outside the selected channel bandpass, where the adaptive array includes antennas for generating wideband input signals, weights for generating weighted wideband input signals, adder to sum the weighted wideband input signals, bandpass filter to remove signals from the adder output signal outside the bandpass of the selected channel, feedback function to generate the feedback signal from the bandpass filter output signal, a weight calculator for each weight which includes correlating the wideband signal coupled from the antenna with the feedback signal to generate the weight value. The bandpass filter removes the signals outside the selected channel bandpass, and the weights adapt to reduce interference in the selected channel bandpass. Additionally, the adder output signal can be down converted to IF to generate the IF summed signal, which is bandpass filtered at the IF bandpass. The bandpass filter output signal is applied to the IF feedback function to generate the IF feedback signal. The IF feedback signal is up converted back to the RF frequency of the selected RF channel and coupled to all the weight calculators, where all the RF channels down convert to the same IF frequency.

A method for eliminating the disturbance caused by a mobile station (MS) situated within a certain area 1. In order to be able to prevent disturbance caused by a mobile station reliably, the mobile station (MS) is provided with control means for the muting of the mobile station as a response to a predetermined message (S1) transmitted to the mobile station, and transmitting means (BTS) are arranged in said certain area 1 for the transmitting of said predetermined message to a mobile station situated in the area 1 in order to mute the mobile station.

A wireless telephone subsystem for coupling line type telephony equipment to the public switched telephone network is described. A base unit is provided which is adapted to be coupled to a plurality of lines of the PSTN. The base unit includes a base coder/decoder which transforms analog signals received from the lines of the PSTN to digital signals and conversely transforms digital signals to analog signals for coupling to the lines of the PSTN. The base unit includes a multiple channel transceiver coupled to the base coder/decoder which responds to the digital signals provided by the base coder/decoder for transmitting those signals by placing selected portions of the digital signals into selected portions of a multiplex frame. The base multiple channel transceiver also receives digital signals and couples those digital signals to the base coder/decoder. Programmable switching means is provided to associate selected of the PSTN lines and selected portions of the multiplex frame. The subsystem also includes a wireless interface unit for connecting to the line type telephony equipment. The wireless interface unit also includes a remote coder/decoder for transforming analog signals received from the line type telephony equipment into digital signals and for transforming other digital signals into analog signals for coupling to the line type telephony equipment. The wireless interface also includes a remote transceiver which is coupled to the remote coder/decoder. The remote transceiver responds to digital signals from the remote coder/decoder for transmitting the signals into selected portions of the multiplex frame and receives other digital signals and couples those to the remote coder/decoder.