[특허]Maximizing data rate by adjusting codes and code rates

Maximizing data rate by adjusting codes and code rates 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H04L-027/06 H04L-027/22 H03M-013/00 G11B-020/18 H03M-013/35 H04B-001/707 H04J-013/00 H04L-001/00 H04L-025/14 H04L-001/18
출원번호	US-0493575 (2012-06-11)
등록번호	US-8964909 (2015-02-24)
발명자 / 주소	Hoffman, John E. Nelson, Jr., George Rodney Riley, Daniel I. Rouphael, Antoine J. Proctor, Jr., James A.
출원인 / 주소	Intel Corporation
대리인 / 주소	Blakely, Sokoloff, Taylor & Zafman LLP
인용정보	피인용 횟수 : 0 인용 특허 : 67

초록 ▼

The present invention provides for making code rate adjustments and modulation type adjustments in a pseudonoise (PN) encoded CDMA system. Coding rate adjustments may be made by changing the number of information bits per symbol, or Forward Error Code (FEC) coding rate. A forward error correction (FEC) block size is maintained at a constant amount. Therefore, as the number of information bits per symbol are increased, an integer multiple of bits per epoch is always maintained. The scheme permits for a greater flexibility and selection of effective data rates providing information bit rates ranging from, for example, approximately 50 kilobits per second to over 5 mega bits per second (Mbps) in one preferred embodiment.

대표청구항 ▼

1. A subscriber unit comprising: a forward error correction (FEC) decoder configured to FEC decode a plurality of data blocks, wherein each of the plurality of data blocks is a fixed size and encoded with an error correction code, and to strip redundant FEC code bits from the plurality of data blocks and generate a plurality of decoded segments based on the plurality of data blocks, wherein each of the decoded segments is a variable number of data bits; anda controller configured to select a decoding rate and to signal the selected decoding rate to the FEC decoder. 2. The subscriber unit of claim 1, wherein the FEC decoder is configured to decode each of the plurality of data blocks based on the selected decoding rate. 3. The subscriber unit of claim 2, wherein a size of each of the plurality of decoded segments is based on the selected decoding rate. 4. The subscriber unit of claim 1, further comprising: a segment disassembler configured to generate a data frame based on the plurality of decoded segments. 5. The subscriber unit of claim 1, further comprising: a demodulator configured to demodulate a received signal and to generate the plurality of data blocks. 6. The subscriber unit of claim 5, wherein the demodulator is configured to demodulate the received signal using a Quadrature Phase Shift Keying (QPSK) modulation scheme. 7. The subscriber unit of claim 5, wherein the demodulator is configured to demodulate the received signal using a Quadrature Amplitude Modulation (QAM) modulation scheme. 8. A method for use in a subscriber unit, the method comprising: forward error correction (FEC) decoding a plurality of data blocks including stripping redundant FEC code bits from the plurality of data blocks, wherein each of the plurality of data blocks is a fixed size and encoded with an error correction code;generating a plurality of decoded segments based on the plurality of data blocks, wherein each of the plurality of decoded segments is a variable number of data bits; andselecting a decoding rate, wherein a size of each of the plurality of decoded segments is based on the decoding rate. 9. The method of claim 8, wherein the decoding is performed based on the selected decoding rate. 10. The method of claim 9, wherein a size of each of the plurality of decoded segments is based on the selected decoding rate. 11. The method of claim 8, further comprising: generating a data frame based on the plurality of decoded segments. 12. The method of claim 8, further comprising: demodulating a received signal to produce the plurality of data blocks. 13. The method of claim 12, wherein the demodulating uses a Quadrature Phase Shift Keying (QPSK) modulation scheme. 14. The method of claim 12, wherein the demodulating uses Quadrature Amplitude Modulation (QAM) modulation scheme.

이 특허에 인용된 특허 (67)

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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Maximizing data rate by adjusting codes and code rates 원문보기

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Maximizing data rate by adjusting codes and code rates 원문보기

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