Abstract: An intermediate frequency adaptive cross polarization interference canceler for processing an interfering cross polarization signal distorted by dispersion. The canceler has right and left inputs for respectively receiving right and left polarized IF input signals. A plurality of serially coupled complex multiplier and control stages respectively process the right and left polarized signals to provide controlled amounts of coupling between them to cancel cross polarization interference therebetween. A plurality of delay lines add predetermined time shifts to the right and left polarized signals between stages, and which forms a transversal filter having a predetermined number of taps. The canceler outputs right polarized IF output signal and a left polarized IF output signal having substantially no cross polarization interference therebetween. A preferred embodiment of the adaptive cross polarization interference canceler uses a compensating five-tap transversal filter disposed in the cancellation path.

Abstract: A system and method for providing wireless access to a telephone line of a telephone network utilize a mobile terminal and a crossconnect base station. The mobile terminal transmits a radio frequency signal carrying a telephone communication. The crossconnect base station connects to a telephone line at a crossconnect box of a telephone network, receives the radio frequency signal carrying a telephone communication, and communicates the telephone communication over a connected telephone line.

Abstract: In a cellular telecommunication network utilizing home location registers for completion of calls to and from a mobile station, a system and method is disclosed for loading and accessing database information relating to the mobile station, and completing calls to the mobile station while roaming in a visited foreign network without incurring long distance charges. The radio telecommunication system includes a mobile station having a mobile subscriber number (MSNB) and a first subscriber number (SNB), a home network having a mobile switching center (MSC) and a first home location register (HLR) which maintains database information relating to the mobile station, and a visited foreign network having a visited mobile switching center (V-MSC) and a second HLR. When the mobile station roams into the visited foreign network, a second SNB is assigned to the MSNB, and subscriber information is stored in the second HLR.

Abstract: A mobile client system in which a tripartite organization is used to facilitate adaptation of the system to alternate or later developed wireless communication technology. In particular, the system of this invention contemplates the provision of an intermediate element, here called a holster, to enable effective cooperation between a computer system and a radio frequency transceiver. The transceiver, as here contemplated, will have additional capability beyond simple data exchange, and preferably will be a telephone or have telephone capability.

Abstract: Measurements of the load being carried on the control channel of a cellular telephone network air interface are made and then processed to identify a maximum permitted short message service message length for control channel transmission. Short message service messages with lengths less than the permitted maximum are authorized for transmission over the control channel. Any short message service message having a length exceeding the determined maximum length, however, is refused authorization for control channel transmission. The refused messages are either saved for control channel transmission at a later time when the measured loading permits or transmitted over the traffic channel portion of the air interface.