A technique for estimating parameters for adaptive antenna arrays in orthogonal frequency division multiplexing systems with co-channel interference is disclosed. Channel parameter estimation is preferentially performed using a two pass process that advantageously expands the temporal scope (relative to a single pass process) and considers past, present and future temporal channel estimations during parameter estimation. Channel parameters are estimated by processing the signals through fast Fou...

An emergency telecommunications system wherein the distress signals are transmitted repeatedly in successive sequences each comprised of a detect interval during which an alarm signal is transmitted and of a message transmit interval during which the distress message itself is transmitted indicating particularly the identity of the ship, its location and the nature of distress. During the detect interval, the transmitted signal is comprised of a carrier phase modulated by a sub-carrier, the freq...

Partitions in the shipbuilding docks are supported by minimum weight brackets specially designed for arbitrary provision of the same in the docks.

A baseband signal communication apparatus includes a transmission unit and a reception unit. The transmission unit superposes a subcarrier on one value of a baseband signal consisting of binary values, modulates a carrier with the baseband signal on which the subcarrier is superposed, and transmits the baseband signal as a transmission signal wave. The reception unit demodulates the baseband signal having the subcarrier superposed thereon by using a demodulator upon reception of the transmission...

A method and apparatus for improved timer based registration for a mobile device with a network, the network having a standard slot cycle time for interrupts, the method comprising the steps of: receiving, at the mobile device, a system parameter message from the network, the message having a value indicating a frequency for periodic registration; setting a timer value on a timer at the mobile device, the timer value being greater than the standard slot cycle time; setting a counter to count exp...

A system for monitoring carriers of peripheral zones in a mobile telecommunication system, wherein when monitoring the carriers transmitted from the base stations in peripheral zones, the mobile units deem transmissions carriers to be true carriers received from peripheral zones and monitor the same when the two conditions stand that the received field strengths of the transmission carriers are at least a certain level and that there is significant data transmitted by the transmission carriers. ...

A transfer function generator provides the ability to provide a non-linear response in a feedback loop to compensate for non-linearities introduced elsewhere in the system. The transfer function generator includes a non-linear function generator configured to provide an output current that is a non-linear function of an input signal representing an error to be corrected. The transfer function generator can also include a linear function generator configure to provide a linear output current as a...

A method for keeping the closed loop adjustment of the transmission power of the mobile station in a CDMA mobile communication system almost constant until the base station succeeds in decoding the first preamble frame without error, thus reducing interference by preventing transmission power overshoot.

The communication terminal apparatus measures reception quality and reports the measurement result to the base station apparatus, and the base station apparatus switches the transmission rate based on the reported result of the reception quality. In this way, the transmission rate is switched starting at the point in time at which the reception quality of the communication terminal apparatus deteriorates. Furthermore, the transmission rate is switched so that the amount of interference with othe...

An adaptive controller adaptively controls a plurality of variable high frequency devices. A calculation part calculates a scalar function value by using a signal varied in accordance with impedances of the variable high frequency devices, a reference signal, and a predetermined scalar function. An impedance variation part creates a signal that sequentially varies the impedances of the variable high frequency devices. A determination part determines, when the impedance of one of the variable hig...