초록 ▼

Stations like mobile terminals, bases stations and network nodes comprising rake receivers with fingers require relatively many calculations to be performed for despreading a symbol. By replacing despreading multipliers, integrators and dumpers in the fingers by Hadamard transformers (62), chips of

Stations like mobile terminals, bases stations and network nodes comprising rake receivers with fingers require relatively many calculations to be performed for despreading a symbol. By replacing despreading multipliers, integrators and dumpers in the fingers by Hadamard transformers (62), chips of several symbols with orthogonal channelization codes can be despreaded simultaneously, and the station and the rake receiver have become more efficient. The despreading section (60 of the finger (34) comprises the Hadamard transformer (62) and a serial-to-parallel converter (61) comprising downsamplers (71-73). The station is a high-speed downlink packet access station (HSDPA) in a universal mobile telecommunication system (UMTS), with a number of de-channelization codes used being at least ten percent of a despreading factor used. For example, the despreading factor used is equal to sixteen, with the maximum possible number of de-channelization codes used being equal to five, ten or fifteen, depending on the capability class of the station.

대표청구항 ▼

The invention claimed is: 1. A station, comprising a rake receiver with a finger, which finger comprises a Hadamard transformer that uses a number of de-channelization codes that is at least ten percent of a despreading factor used. 2. A station as defined in claim 1, wherein the finger comprises

The invention claimed is: 1. A station, comprising a rake receiver with a finger, which finger comprises a Hadamard transformer that uses a number of de-channelization codes that is at least ten percent of a despreading factor used. 2. A station as defined in claim 1, wherein the finger comprises a descrambling section and a despreading section, which despreading sections comprises the Hadamard transformer. 3. A station as defined in claim 2, wherein the descrambling section comprises a multiplier for multiplying a finger input signal with a complex conjugated scrambling code for descrambling the finger input signal, and wherein the despreading section further comprise a serial-to-parallel converter for serial-to-parallel converting a descrambled signal, which serial-to-parallel converter comprises downsamplers coupled to inputs of the Hadamard transformer and comprises a selector for generating despreaded symbols per channel, which selector is coupled to outputs of the Hadamard transformer. 4. A station as defined in claim 3, wherein the rake receiver further comprises: a further finger; a delaying section for delaying a frequency converted signal and for generating the finger signal destined for the finger and a further finger signal destined for the further finger; and a synchronization section for receiving the frequency converted signal and for in response controlling the delaying section. 5. A station as defined in claim 1, wherein the despreading factor used is equal to sixteen, with the maximum possible number of de-channelization codes used being equal to five, ten or fifteen. 6. A rake receiver for use in a station, the rake receiver comprising a finger, which finger comprises a Hadamard transformer, wherein the Hadamard transformer uses a number of de-channelization codes that is at least ten percent of a despreading factor used by the rake receiver. 7. A finger for use in a rake receiver, the finger comprising a descrambling section and a despreading section, said despreading section including a Hadamard transformer that uses a number of de-channelization codes that is at least ten percent of a despreading factor used. 8. A station as defined in claim 1, further comprising a radio stage having an output coupled to an input of the rake receiver and configured to receive an input radio signal. 9. A rake receiver as defined in claim 6, wherein the finger comprises a descrambling section and a despreading section, which despreading section comprises the Hadamard transformer. 10. A rake receiver as defined in claim 9, wherein the descrambling section comprises a multiplier for multiplying a finger input signal with a complex conjugated scrambling code for descrambling the finger input signal, and wherein the despreading section further comprise a serial-to-parallel converter for serial-to-parallel converting a descrambled signal, which serial-to-parallel converter comprises downsamplers coupled to inputs of the Hadamard transformer and comprises a selector for generating despreaded symbols per channel, which selector is coupled to outputs of the Hadamard transformer. 11. A rake receiver as defined in claim 6, wherein the rake receiver further comprises: a further finger; a delaying section for delaying a frequency converted signal and for generating the finger signal destined for the finger and a further finger signal destined for the further finger; and a synchronization section for receiving the frequency converted signal and for in response controlling the delaying section. 12. A rake receiver as defined in claim 6, wherein the despreading factor used is equal to sixteen, with the maximum possible number of de-channelization codes used being equal to five, ten or fifteen. 13. A finger as defined in claim 7, further comprising a descrambling section and a despreading section, which despreading section comprises the Hadamard transformer. 14. A finger as defined in claim 13, wherein the descrambling section comprises a multiplier for multiplying a finger input signal with a complex conjugated scrambling code for descrambling the finger input signal, and wherein the despreading section further comprise a serial-to-parallel converter for serial-to-parallel converting a descrambled signal, which serial-to-parallel converter comprises downsamplers coupled to inputs of the Hadamard transformer and comprises a selector for generating despreaded symbols per channel, which selector is coupled to outputs of the Hadamard transformer. 15. A finger as defined in claim 7, wherein the despreading factor used is equal to sixteen, with the maximum possible number of de-channelization codes used being equal to five, ten or fifteen.