Re: question on parity

I'm not sure which reference you are referring to but the last two bits of
HOW when decoded should be 00.  If the polarity is unknown it could be 11.
The reference to check with is ICD-GPS-200.

Cliff
----- Original Message ----- 
From: "si chuanyu" <[email protected]>
To: <[email protected]>
Sent: Monday, June 07, 2004 2:37 AM
Subject: [OpenSource_GPS] question on parity


> hi
>    I found in the reference that the sum of the last two bits of HOW in
> each subframe should be +2 or -2. but in the reference code, after
encoding
> the subframe and adding parity, the last two bits of subframe[][2] was 1
or
> -1. thus in the receiver, we can't pass parity check. what's the problem
> with that? do I missed something else? thanks a lot!
>
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