Siemens Aktiengesellschaft

Nokia Siemens Networks Gmbh & Co Kg

Markus Nasshan

Anja Klein

Holger Landenberger

Lutz Jarbot

Klaus-Dieter Pillekamp

Paul-Walter Baier

Albrecht Kunz

Bernd Steiner

The present invention aims at providing flexible and optimal configuration of an air interface of a transmitter in a radio system, more particularly a mobile radiotelephone system. According to the present invention, the data of a subscriber-specific control channel transmitted by the transmitter is transmitted with an adaptively modifiable frequency position or band width. The subscriber-specific control channel may include pilot symbols for channel evaluation, TCP symbols for power regulation, TFI symbols for transmitting transmission format information and other symbols, wherein the desired frequency position or band width can be individually adjusted for the individual symbol groups.

Method and device for transmitting data of a subscriber-specific control channel in a radio system

In order to improve the performance of physical channels in telecommunications systems using wire-free telecommunication between mobile and/or stationary transmitting/receiving appliances as a function of; the channel data transmission rate, the system environment, the system utilization and the distance between the transmitting/receiving appliances, such that no circuitry changes are required to the transmitters and/or receivers in the transmitting/receiving appliances, an air interface is proposed, in which the number of Nbits, Nbits and Nbits are each variable, and in which, in particular during an active or passive telecommunications link between the mobile and/or stationary transmitting/receiving appliances in the telecommunications system, the number of Nbits, Nbits and Nbits can each be varied and/or optimized adaptively by control means, such as by suitable 'layeror 'layersignaling (&#x201c;layersignaling) which takes place, for example, via the DPDCH channel.

Air interface for telecommunications systems with cordless telecommunications between mobile and/or stationary transmitting receiving devices

An apparatus and associated method are provided, wherein, using an external-signal detection apparatus for detecting external signals of the available channels of a jointly used transmission-medium and a priority-apparatus for detecting at least one separate transmission-medium use priority, and with a data communication interface controlling data transmission on the basis of the detected external signals in the at least one detected transmission-medium use priority, both identical and different independent communication systems are allowed to coexist in a simple and inexpensive manner.

Apparatus and method for allowing communication systems to coexist

In order to improve the performance of physical channels in telecommunications systems using wire-free telecommunication between mobile and/or stationary transmitting/receiving appliances as a function of; the channel data transmission rate, the system environment, the system utilization and the distance between the transmitting/receiving appliances, such that no circuitry changes are required to the transmitters and/or receivers in the transmitting/receiving appliances, an air interface is proposed, in which the number of N bits, N bits and N bits are each variable, and in which, in particular during an active or passive telecommunications link between the mobile and/or stationary transmitting/receiving appliances in the telecommunications system, the number of N bits, N bits and N bits can each be varied and/or optimized adaptively by control means, such as by suitable &ldquo;layer &rdquo; or &ldquo;layer &rdquo; signaling (&ldquo;layer &rdquo; signaling) which takes place, for example, via the DPDCH channel.

The correlations of different channel impulse responses are used to improve, simplify and optimize the assessment of wire-free transmission channels in telecommunications systems. In particular, the different channel and pulse responses are correlated by identifying a similarity between the different responses and driving a mean channel impulse response from the different channel impulse responses when they are identified as similar.

Estimation of transmission channels in communication systems for wireless telecommunication

The invention relates to a telecommunication system wherein the known multi-code option is used in downlink (direction of transmission: base station to mobile station) and the known multi-slot option is used in upink (direction of transmission: mobile station to base station).

Telecommunication system for wireless telecommunication with a CDMA, FDMA, and TDMA multiple access component

A reception device is disclosed for a radio communication system for the reception of subscriber signals via a radio interface. The reception device contains a means for determining number of active subscribers from the a total number of subscribers that are assigned to the radio interface, and contains a further detection device for detecting at least one subscriber signal. As a result of the determination of the subscribers actually active from the subscriber signals, a detection is simplified particularly when the subscriber signals are separated by a fine structure.

Reception device for a radio communication system for receiving subscriber signals via a radio interface

A process for receiving data in which the channel pulse responses are estimated, whereby a time interval between adjustments of a receiver to current channel pulse responses is varied and is adjusted to a change in transmission properties of transmission channels.

Channel estimation performed at varying time intervals

In a radio system which operates using code division multiplex (CDMA) the interference in the training sequences, for example interblock sequences, of all the K subscribers in the received signal is overcome before data detection at the receiving end. The interference in the training sequences of all K subscribers is modeled using the estimated channel pulse responses and, finally, is subtracted from the received signal. The method and apparatus can be used in CDMA mobile radio systems, in particular with joint detection.

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Erding, Germany

Markus Nasshan