| To: | [email protected] |
|---|---|
| Subject: | Re: LF: More EbNaut 137.777 - TA slot |
| From: | Paul Nicholson <[email protected]> |
| Date: | Sat, 05 Dec 2015 17:32:03 +0000 |
| In-reply-to: | <[email protected]> |
| References: | <[email protected]> <[email protected]> <[email protected]> <[email protected]> <[email protected]> <[email protected]> |
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| Sender: | [email protected] |
| User-agent: | Mozilla/5.0 (X11; Linux i686; rv:17.0) Gecko/20130106 Thunderbird/17.0.2 |
The 15:00 message found rank 0: VO1NA ps [ 2 30 30 30 30] re-encode 389/1056 ber 3.68e-01 Es/N0=-12.4 Eb/N0=3.1 but I had to use a frequency offset. This time the signal was too weak to see the symbols but knowing the message I could reverse the modulation to get the carrier, then measure its frequency. The spectrum peaked at -256 uHz and this offset in the decoder gave an easy decode. Without the offset - nothing, so this couldn't have been decoded without already knowing the message. -- Paul Nicholson -- |
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