JP2003018046A5 - - Google Patents
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- JP2003018046A5 JP2003018046A5 JP2001195685A JP2001195685A JP2003018046A5 JP 2003018046 A5 JP2003018046 A5 JP 2003018046A5 JP 2001195685 A JP2001195685 A JP 2001195685A JP 2001195685 A JP2001195685 A JP 2001195685A JP 2003018046 A5 JP2003018046 A5 JP 2003018046A5
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Claims (4)
前記サーチ部は、下り回線に含まれるセルサーチ用チャネルとパスサーチ用チャネルとで変調方式が異なるCDMAセルラシステムにおいて、セルサーチに用いるマッチドフィルタとパスサーチに用いるマッチドフィルタを時分割で共用するにあたり、セルサーチ時とパスサーチ時とでマッチドフィルタのタップ長を異ならせてサーチすることを特徴とするCDMA受信装置。 An antenna that receives a radio signal in the RF band of the downlink by CDMA, an RF unit that outputs a radio signal in the RF band that is received by the antenna by down-conversion and band limitation, and an output of the RF unit is A / D An A / D converter that converts and outputs, a search unit that performs cell search and path search using the output of the A / D converter, and a received signal is demodulated using the search result of the search unit A CDMA receiver having a demodulation unit,
In the CDMA cellular system in which the modulation method is different between the cell search channel and the path search channel included in the downlink , the search unit shares the matched filter used for the cell search and the matched filter used for the path search by time division. , CDM a receiving apparatus characterized by searching with different tap lengths of the matched filter at the time of cell search and path search time.
前記セルサーチを行う場合には、前記シフトレジスタから、前記第1の積算部には該シフトレジスタに格納される受信データのうちの第1の部分データを入力し、前記第2の積算部には該シフトレジスタに格納される受信データのうちの第2の部分データを入力し、
前記第1の積算部は、セルサーチ用拡散符号のうち第1の部分系列を係数として該係数と前記第1の部分データとの積算結果を出力し、
前記第2の積算部は、セルサーチ用拡散符号のうち第2の部分系列を係数として該係数と前記第2の部分データとの積算結果を出力し、
前記第1および第2の積算部の出力の和を相関結果として出力し、
前記パスサーチを行う場合には、前記シフトレジスタから、前記第1および第2の積算部に該シフトレジスタに格納される受信データの一部である同じ部分データを入力し、
前記第1の積算部は、パスサーチ用拡散符号のうちのI成分の系列を係数として該係数と前記部分データとの積算結果をI成分の相関結果として出力し、
前記第2の積算部は、パスサーチ用拡散符号のうちのQ成分の系列を係数として該係数と前記部分データとの積算結果をQ成分の相関結果として出力することを特徴とするCDMA受信装置。2. The CDMA receiver according to claim 1, wherein the search unit includes a shift register to which reception data that is an output signal from the A / D converter is input, and first and second integration units. And
When performing the cell search, the first partial data of the received data stored in the shift register is input from the shift register to the first integrating unit, and the second integrating unit is input to the second integrating unit. Inputs the second partial data of the received data stored in the shift register,
The first integration unit outputs an integration result of the coefficient and the first partial data using the first partial sequence of the cell search spreading code as a coefficient,
The second integration unit outputs the integration result of the coefficient and the second partial data using the second partial sequence of the cell search spreading code as a coefficient,
Outputting the sum of the outputs of the first and second integrating units as a correlation result;
When performing the path search, the same partial data that is a part of the received data stored in the shift register is input from the shift register to the first and second integration units,
The first integrating unit outputs an integration result of the coefficient and the partial data as a correlation result of the I component using a sequence of the I component of the spread code for path search as a coefficient,
The second integrating unit outputs a result of integrating the coefficient and the partial data as a Q component correlation result using a Q component sequence of the path search spreading code as a coefficient. .
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001195685A JP3918467B2 (en) | 2001-06-28 | 2001-06-28 | CDMA baseband receiver circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001195685A JP3918467B2 (en) | 2001-06-28 | 2001-06-28 | CDMA baseband receiver circuit |
Publications (3)
Publication Number | Publication Date |
---|---|
JP2003018046A JP2003018046A (en) | 2003-01-17 |
JP2003018046A5 true JP2003018046A5 (en) | 2005-06-23 |
JP3918467B2 JP3918467B2 (en) | 2007-05-23 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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JP2001195685A Expired - Fee Related JP3918467B2 (en) | 2001-06-28 | 2001-06-28 | CDMA baseband receiver circuit |
Country Status (1)
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JP (1) | JP3918467B2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101651641A (en) * | 2008-08-13 | 2010-02-17 | 中兴通讯股份有限公司 | Circuit device and method for matched filtering in baseband processing system of terminal equipment |
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2001
- 2001-06-28 JP JP2001195685A patent/JP3918467B2/en not_active Expired - Fee Related
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