Abstract: A test system for testing follower jammer robustness of a radio is described. The test system comprises a signal analyzer and a signal generator that are connected with each other via a communication connection. The signal analyzer is configured to record a radio communication signal and to convert the recorded radio communication signal to a processing signal that is compatible for the communication connection. The signal generator is configured to add at least one delayed signal to the processing signal. Further, a method of testing follower jammer robustness of a radio is described.

Abstract: A test system for testing follower jammer robustness of a radio is described. The test system comprises a signal analyzer and a signal generator that are connected with each other via a communication connection. The signal analyzer is configured to record a radio communication signal and to convert the recorded radio communication signal to a processing signal that is compatible for the communication connection. The signal generator is configured to add at least one delayed signal to the processing signal. Further, a method of testing follower jammer robustness of a radio is described.

Abstract: A mobile station (105, 200) operable in a wireless communication system (100), the mobile station including means (218, 202 of 105) for reporting to a location server (104) of the system a current location of the mobile station and a controller (201 of 105) for controlling the means for reporting to report to the location server a current location of a second mobile station (107) detected to be near to the mobile station. A wireless communication system (100) in which the mobile station is operable and a method (500) operable in the system are also described.

Abstract: A mobile station (105, 200) operable in a wireless communication system (100), the mobile station including means (218, 202 of 105) for reporting to a location server (104) of the system a current location of the mobile station and a controller (201 of 105) for controlling the means for reporting to report to the location server a current location of a second mobile station (107) detected to be near to the mobile station. A wireless communication system (100) in which the mobile station is operable and a method (500) operable in the system are also described.

Abstract: A method of synchronising a wireless communication unit in a communication system, the method comprising at said wireless communication unit the steps of: monitoring transmissions from a communication system and processing (400) frequency and/or timing information from the communication system. The method further includes the steps of transmitting (404) frequency and/or timing information by said wireless communication unit; receiving and processing (406) said frequency and/or timing information transmitted by said wireless communication unit at a receiving portion of said wireless communication unit. The wireless communication unit then compares frequency and/or timing information transmitted from the communication system to that transmitted by said wireless communication unit; and synchronises said wireless communication unit if said comparison step does not yield a match. A wireless communication unit and a communication system are also provided.

Abstract: In a communication device (100) with an earpiece (110) and a microphone (120), there is a sensor (130) relating a first connection line (105) from the earpiece (110) to the microphone (120) on a system (200, 300) which is independent of the device and of the person using it, such as the earth's gravitational field, and which selects the operating mode QUIET (1) or LOUD (2) of the communication device in accordance with this. The sensor (130) switches the communication device (100) to QUIET when the angle (230) between the connecting line (105) and the plumbline (205) of the gravitational field basically corresponds to the angle (330) between a second connecting line between the ear (310) and the mouth (320) of a person (300) who is authorized to make the call, so as to bar other persons (400) who are in the vicinity (X2) from hearing the output from the communication device loudspeaker (110).

Abstract: An RF power amplifier is provided having means for defining rise and fall envelopes of the RF power, i.e. the key and de-key characteristics. A power amplifier (10), detector (13) and regulator (15 ) form a power control feedback loop. A further regulator (21) is provided having a first input coupled to the output of the power control loop regulator and an output coupled to the input of the power control loop regulator, thereby providing negative feedback to the power control loop regulator. Means are provided, coupled to a second input of the further regulator for providing a rising and falling control signal (Vramp) for control of the power amplifier.