High data rate CDMA wireless communication system using variable sized channel codes
First Claim
1. A method for generating data for transmission from a subscriber unit to a base station, the method comprising:
- modulating each of a plurality of channel encoded data with an associated code to produce a plurality of streams of modulated symbols;
combining the plurality of streams of modulated symbols into two combined streams to reduce a peak-to-average ratio of the transmission; and
complex multiplying said two combined streams with a complex pseudonoise code.
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Abstract
Method and apparatus for high rate code-division multiple access wireless communication is described. Each of a channel encoded data is modulated by an associated code having a small number of pseudo-noise spreading chips per orthogonal waveform period, thus producing a set of streams of modulated symbols. Each of the set of streams of modulated symbols is then gain adjusted, and combined to yield two streams of combined symbols. The combination is the set of streams is carried out to reduce a peak-to-average ratio of the transmission. The resulting two combined symbol streams are modulated by a complex multiplyer using a user long code and a pseudorandom spreading code (PN code) and upconverted for transmission.
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Citations
34 Claims
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1. A method for generating data for transmission from a subscriber unit to a base station, the method comprising:
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modulating each of a plurality of channel encoded data with an associated code to produce a plurality of streams of modulated symbols;
combining the plurality of streams of modulated symbols into two combined streams to reduce a peak-to-average ratio of the transmission; and
complex multiplying said two combined streams with a complex pseudonoise code. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 14, 15, 16, 17, 34)
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12. The method as claimed in claim I wherein said complex multiplying comprises:
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using a first of the at least one combined streams and an in-phase pseudonoise code component as real parts; and
using a second of the at least one combined streams and a quadrature-phase pseudonoise code component as imaginary parts. - View Dependent Claims (13)
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18. An apparatus for generating data for transmission from a subscriber unit to a base station, the apparatus comprising:
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a plurality of modulators configured to modulate each of a plurality of channel encoded data with an associated code to produce a plurality of streams of modulated symbols;
a combiner, communicatively coupled to said plurality of modulators, configured to combine the plurality of streams of modulated symbols into two combined streams to reduce a peak-to-average ratio of the transmission; and
a complex multiplier, communicatively coupled to said combiner, configured to complex multiply said two combined streams with a complex pseudonoise code. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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Specification