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Pn lock indicator for dithered pn code tracking loop
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Copyright Year | 1981 |
| Description | In a delay-lock one-delta (+or - 1/2 chip) dithered PN code tracking loop, an indication of lock in the PN code tracking loop is provided by delaying the dithered local PN code by a half chip to produce a +0, -1 dithered PN code that is then multiplied with the received PN-spread IF signal to produce a signal proportional to the correlation of this dithered code offset from the received code. The correlation signal is bandpass filtered, amplified with AGC control, and square-law detected to obtain a dc signal proportional to the degree of correlation. The dc signal is multiplied by the dithering control signal to effectivity substract noise voltage from the lock correlation signal which is then compared with a PN lock status signal. |
| File Size | 400781 |
| Page Count | 6 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19810024862 |
| Archival Resource Key | ark:/13960/t1mh2f92z |
| Language | English |
| Publisher Date | 1981-07-14 |
| Access Restriction | Open |
| Subject Keyword | Electronics And Electrical Engineering Random Signals Phase Locked Systems Tracking Filters Frequency Discriminators Intermediate Frequencies Flip-flops Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Patent |
