发明名称 |
Digitaler asynchroner Spreizspektrumempfänger |
摘要 |
<p>A direct conversion receiver for a delay-and-correlate transmitted reference spread spectrum signaling method and apparatus is based on minimal component digital circuitry instead of analog delay and multiplier circuits. The method allows direct RF to baseband conversion and eliminates the need for an IF stage. The receiver includes an RF convener (22) for converting a received direct sequence spread spectrum signal to baseband. An analog-to-digital converter (24) samples the baseband signal at a rate greater than the chipping rate of the direct sequence spread spectrum signal. A delay stage (25) coupled to the output of the analog-to-digital converter generates a delayed signal. Multiplier logic (26) receives ouptput signals from the analog-to-digital converter and the delay stage and, in response, generates control output signals. A counter (27) responsive to the control output signals increments or decrements a count or recycles, depending on the decoded control output signals. <IMAGE></p> |
申请公布号 |
DE69734546(D1) |
申请公布日期 |
2005.12.15 |
申请号 |
DE1997634546 |
申请日期 |
1997.08.01 |
申请人 |
GENERAL ELECTRIC CO., SCHENECTADY |
发明人 |
ORLOWSKI, EUGENE JOESPH;ROSS, JOHN ANDERSON FERGUS |
分类号 |
H04L27/26;H04B1/16;H04B1/707;(IPC1-7):H04B1/707 |
主分类号 |
H04L27/26 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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