Nokia Corporation

Stephen Wladyslaw Wasko

Janne Aaltonen

Mauri Honkanen

Juha Salo

Rod Walsh

Andre P Dekker

Kari Tapio Reponen

The invention is a method and transmission system which transmits an analog composite signal, including carriers which are respectively modulated with different digital data signal. A transmission system in accordance with the invention includes a signal combiner (), responsive to the digital data signals, which are provided as inputs to the signal combiner, the signal combiner providing an output of a combined digital signal representing combining of the digital data signals; a multiple carrier transmitter () which transmits the analog composite signal; a digital to analog converter () which converts a composite digital signal input into the analog composite signal, the digital to analog converter having a dynamic range of digital to analog conversion; and a digital scaler (), responsive to the combined digital signal provided by the signal combiner, which outputs the composite digital signal that is digital to analog converted by the digital to analog converter, the composite digital signal being a function of the combined digital signal provided by the signal combiner and having a controlled magnitude which results in as much of the dynamic range of the digital to analog converter as possible being used during digital to analog conversion of the composite digital signal without clipping the composite digital signal.

Method and system having capacity-dependent baseband gain and coverage-capacity swapping in a multi-carrier base station transmitters

A broadband digital broadcastnetwork is described in which the cellular topology is dynamically configurable to maintain spectral efficiency. The reconfiguration of the topology occurs in response to changes in the demand for content. Thus, a single cell could be defined to cover an area in which the same content is being delivered to a substantial number of users. Conversely, a large number of cells could be defined to cover an area in which a substantial number of users are each having different content delivered to them.

System and method for dynamically configuring a cellular radio network topology based on content demand

There is disclosed a network in which there is provided a method of controlling a network element having variable transmission modes, comprising: defining the available transmission modes in the network; and storing the defined transmission modes in a network element, wherein the transmission modes of the network element are determined in dependence on the stored available transmission modes.

Control of network element supporting variable transmission modes

A transmitter for transmitting RF data in an RF communication network using a plurality of carrier frequencies is described. The transmitter has a data splitter for receiving an information signal at an intermediate frequency lower than the carrier frequency, and two transmitter paths each having an input connected to the data splitter and each having a frequency modulator for upconverting the intermediate frequency to a respective carrier frequency, the carrier frequency being individually selectable for each transmitter path.

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Lostwithiel, United Kingdom

Stephen Wladyslaw Wasko