Wideband multiple access telecommunication method and apparatus
First Claim
1. In a wireless communication system having at least one basestation and at least one terminal, a method of wideband multiple access communication, comprising:
- transmitting a block from a basestation to a terminal, the block comprising a plurality of chip symbols scrambled with a base station specific scrambling code, the plurality of chip symbols comprising a plurality of spread user specific data symbols which are user specific data symbols spread by using user specific spreading codes and at least one pilot symbol; and
performing in the terminal;
generating a plurality of independent signals having at least a channel distorted version of the transmitted block;
combining the plurality of independent signals with a combiner filter with filter coefficients which are determined by using the pilot symbol, thus obtaining a combined filtered signal; and
despreading and descrambling the combined filtered signal with a composite code of the basestation specific scrambling code and one of the user specific spreading codes.
2 Assignments
0 Petitions
Accused Products
Abstract
The present invention is related to a system and method for wideband multiple access telecommunication. In the method, a block is transmitted from a basestation to a terminal. The block comprises a plurality of chip symbols scrambled with a base station specific scrambling code, the plurality of chip symbols comprising a plurality of spread user specific data symbols which are user specific data symbols spread by using user specific spreading codes and at least one pilot symbol. In the terminal, at least two independent signals that comprise at least a channel distorted version of the transmitted block are generated. The two independent signals are combined with a combiner filter with filter coefficients which are determined by using the pilot symbol, thus a combined filtered signal is obtained. The combined filtered signal is despread and descrambled with a composite code of the basestation specific scrambling code and one of the user specific codes.
34 Citations
25 Claims
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1. In a wireless communication system having at least one basestation and at least one terminal, a method of wideband multiple access communication, comprising:
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transmitting a block from a basestation to a terminal, the block comprising a plurality of chip symbols scrambled with a base station specific scrambling code, the plurality of chip symbols comprising a plurality of spread user specific data symbols which are user specific data symbols spread by using user specific spreading codes and at least one pilot symbol; and performing in the terminal; generating a plurality of independent signals having at least a channel distorted version of the transmitted block; combining the plurality of independent signals with a combiner filter with filter coefficients which are determined by using the pilot symbol, thus obtaining a combined filtered signal; and despreading and descrambling the combined filtered signal with a composite code of the basestation specific scrambling code and one of the user specific spreading codes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. In a wireless communication system having at least one basestation and at least one terminal, a method of wideband multiple access communication, comprising:
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transmitting a block from a basestation to a terminal, the block comprising a plurality of chip symbols scrambled with a base station specific scrambling code, the plurality of chip symbols comprising a plurality of spread user specific data symbols, which are user specific data symbols spread by using user specific spreading codes and at least one pilot symbol; transmitting projection information, enabling projecting of a signal on the orthogonal complement of the space spanned by the composite codes of the basestation specific scrambling code and the user specific codes; and performing in the terminal; generating at least two independent signals comprising at least a channel distorted version of the transmitted block; combining with a combiner filter with filter coefficients determined by using the projection information being determined on the signals, thus obtaining a combined filtered signal; and despreading and descrambling the combined filtered signal with a composite code of the basestation specific scrambling code and one of the user specific codes. - View Dependent Claims (16, 17)
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18. A receiver system for wireless communication, comprising:
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a receiver configured to receive a block comprising a plurality of chip symbols which are data symbols spread by using scrambling and spreading codes and at least one pilot symbol; at least one combining filter circuit configured to receive at least two independent signals derived from the received block and a circuit configured to determine coefficients of the combining filter circuit by using the pilot symbol, and wherein the combining filter circuit outputs a multi-user interference suppressed signal based on the coefficients; and at least one despreading circuit configured to despread the multi-user interference suppressed signal with one of the scrambling and spreading codes.
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19. A receiver system for wireless communication, comprising:
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a receiver configured to receive a block comprising a plurality of chip symbols which are data symbols spread by using scrambling and spreading codes, and projection information, enabling projecting of a signal on the orthogonal complement of the space spanned by scrambling and spreading codes; at least one combining filter circuit configured to input at least two independent signals derived from the received block and output a multi-user interference suppressed signal; and at least one despreading circuit configured to despread the multi-user interference suppressed signal with one of the scrambling and spreading codes. - View Dependent Claims (20)
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21. A receiver system for wireless communication, comprising:
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J combining filter circuits, each of the combining filter circuits receiving a plurality of independent signals and outputing a multi-user interference suppressed signal a circuit configured to determine the coefficients of the combining filters circuit; a plurality of despreading circuits configured to despread the J multi-user interference suppressed signals; and a combining circuit configured to combine the J multi-user interference suppressed signals.
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22. In a wireless communication system having at least one basestation and at least one terminal, a method of wideband multiple access communication, comprising:
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receiving a block comprising a plurality of chip symbols scrambled with a base station specific scrambling code, the plurality of chip symbols comprising a plurality of spread user specific data symbols which are user specific data symbols spread by using user specific spreading codes and at least one pilot symbol; generating at least two independent signals based on the received block; and combining the at least two independent signals with a combiner filter having filter coefficients which are determined by using the pilot symbol, thus obtaining a combined filtered signal. - View Dependent Claims (23)
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24. A receiver system for wireless communication, comprising:
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means for receiving a block comprising a plurality of chip symbols scrambled with a base station specific scrambling code, the plurality of chip symbols comprising a plurality of spread user specific data symbols which are user specific data symbols spread by using user specific spreading codes and at least one pilot symbol; means for generating at least two independent signals based on the received block; and means for combining the at least two independent signals with a combiner filter having filter coefficients which are determined by using the pilot symbol, thus obtaining a combined filtered signal. - View Dependent Claims (25)
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Specification