[특허]Noncoherent receiver employing a dual-maxima metric generation process

Noncoherent receiver employing a dual-maxima metric generation process 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H04K-001/00
출원번호	US-0083110 (1993-06-24)
발명자 / 주소	Viterbi Audrey (La Jolla CA) Viterbi Andrew J. (La Jolla CA)
출원인 / 주소	Qualcomm Incorporated (San Diego CA 02)
인용정보	피인용 횟수 : 125 인용 특허 : 0

초록 ▼

A method and apparatus for decoding an orthogonally encoded data signal in a noncoherent receiver system. The method is referred to as dual-maxima metric generation. It comprises the steps of sequentially searching for a maximum energy level in each of two subsets of a given set of symbol indexes and associated energy levels and calculating a difference of the two values to form a soft decision output value. The two subsets are identified by the binary value (either “0”or “1”) of a given digit of the binary equivalent of the symbol index. The soft decision output value reflects a measure of confidence of the value of the corresponding digit of the original signal. The dual-maxima generator sequences through the steps one time for each binary digit of the original signal. The method allows the correlated energy from multiple receivers to be combined before the decoding of the signals, thus further reducing the complexity of the circuitry and improving the performance of the decoder.

대표청구항 ▼

A method of decoding an orthogonally encoded data signal corresponding to an original data signal, said orthogonally encoded data signal having a fixed number of possible code values each having an index number wherein a binary equivalent of said index number corresponds to said original data signal, comprising the steps of: receiving a set of energy values, each energy value corresponding to a respective one of said fixed number of code values and corresponding index number; searching a first subset of said set of energy values for a maximum energy value wherein said first subset contains each of said energy values corresponding to an index number having a binary equivalent with a “0”as a preselected digit; searching a second subset of said set of energy values for a maximum energy value wherein said second subset contains each of said energy values corresponding to an index number having a binary equivalent with a “1”as said preselected digit; and forming a difference between said maximum energy value of said first subset and said maximum energy of said second subset wherein said difference is a measure of confidence of the value of a particular digit of said original data signal.

이 특허를 인용한 특허 (125)

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A	생활필수품
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Noncoherent receiver employing a dual-maxima metric generation process 원문보기

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