Transmission method and transmitter
First Claim
1. A transmission method comprising the steps of:
- generating a reference clock signal;
sequentially outputting spread data at a specified timing synchronized with the reference clock, wherein the spread data results from directly spreading transmission data with a spreading code;
distributing the spread data into two sequences of data at a specified timing synchronized with the reference clock;
generating a first pulse shaping signal at a specified timing synchronized with the reference clock;
generating a second pulse shaping signal at a specified timing synchronized with the reference clock;
generating a cosine carrier and a sine carrier;
multiplying one of the two sequences of data, the first pulse shaping signal, and the cosine carrier together;
multiplying the other of the two sequences of data, the second pulse shaping signal, and the sine carrier together; and
synthesizing outputs from the multiplications to acquire an output signal for transmission.
1 Assignment
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Accused Products
Abstract
An objective is to perform pulse modulation so as to allow for an effect of inter-symbol interference in the UWB communication. For this purpose, a reference clock signal is generated. Spread data is sequentially output at a specified timing synchronized with the reference clock. In this case, the spread data results from directly spreading transmission data with a spreading code. The spread data is distributed into two sequences of data at a specified timing synchronized with the reference clock. First and second pulse shaping signals are generated at a specified timing synchronized with the reference clock. A cosine carrier and a sine carrier are generated. One of the two sequences of data is multiplied by the first pulse shaping signal and the cosine carrier. The other of the two sequences of data is multiplied by the second pulse shaping signal and the sine carrier. Outputs from the multiplications are synthesized to acquire an output signal for transmission.
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Citations
10 Claims
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1. A transmission method comprising the steps of:
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generating a reference clock signal; sequentially outputting spread data at a specified timing synchronized with the reference clock, wherein the spread data results from directly spreading transmission data with a spreading code; distributing the spread data into two sequences of data at a specified timing synchronized with the reference clock; generating a first pulse shaping signal at a specified timing synchronized with the reference clock; generating a second pulse shaping signal at a specified timing synchronized with the reference clock; generating a cosine carrier and a sine carrier; multiplying one of the two sequences of data, the first pulse shaping signal, and the cosine carrier together; multiplying the other of the two sequences of data, the second pulse shaping signal, and the sine carrier together; and synthesizing outputs from the multiplications to acquire an output signal for transmission. - View Dependent Claims (2, 3, 4, 5)
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6. A transmitter comprising:
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a clock generation means for generating a reference clock signal; a spread data output means for sequentially outputting spread data at a specified timing synchronized with the reference clock, wherein the spread data results from directly spreading transmission data with a spreading code; a distribution means for distributing the spread data into two sequences of data at a specified timing synchronized with the reference clock; a first pulse shaping signal generation means for generating a first pulse shaping signal at a specified timing synchronized with the reference clock; a second pulse shaping signal generation means for generating a second pulse shaping signal at a specified timing synchronized with the reference clock; a carrier generation means for generating a cosine carrier and a sine carrier; a first multiplication means for multiplying one of the two sequences of data, the first pulse shaping signal, and the cosine carrier together; a second multiplication means for multiplying the other of the two sequences of data, the second pulse shaping signal, and the sine carrier together; and a synthesis means for synthesizing multiplication outputs from the first and second multiplication means. - View Dependent Claims (7, 8, 9, 10)
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Specification
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- Resources
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Current AssigneeSony Corporation (Sony Group Corp.)
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Original AssigneeSony Corporation (Sony Group Corp.)
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InventorsIida, Sachio
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Primary Examiner(s)Ha; Dac V.
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Application NumberUS10/763,173Publication NumberTime in Patent Office1,247 DaysField of Search375/140, 375/141, 375/146, 375/260, 375/261, 375/279, 375/282, 375/269, 375/280, 375/295, 375/354, 375/356, 375/362, 370/320, 370/324, 370/342, 370/441, 370/479, 370/503, 370/536, 370/542, 370/544US Class Current375/146CPC Class CodesH04B 1/7174 Pulse generation in general...H04B 1/719 Interference-related aspects
