Peak detection

Dear all,

I finally figure out how to receive packet using OFDM and Alamouti but
unfortunately looks like I cannot detect all the peaks.
10% of the packets that I receive are right.
I think that I experience a phase rotation, i.e. instead of receiving
-1, I receive +1 for some preamble symbols and hence the channel
estimate matrix has negative components.
I am using PN to detect peaks.

Do you have any advise or suggestion on how to fix this?
I though to put a delay using a sleep in the alamouti encoder between
2 consecutive OFDM symbols in order to avoid the overlapping of
symbols but it doesn’t work.

Looking forward to hearing from you

Vanessa

Dear all,

I finally figure out how to receive packet using OFDM and Alamouti but
unfortunately looks like I cannot detect all the peaks.
10% of the packets that I receive are right.
I think that I experience a phase rotation, i.e. instead of receiving
-1, I receive +1 for some preamble symbols and hence the channel
estimate matrix has negative components.
I am using PN to detect peaks.

Do you have any advise or suggestion on how to fix this?
I though to put a delay using a sleep in the alamouti encoder between
2 consecutive OFDM symbols in order to avoid the overlapping of
symbols but it doesn’t work.

Looking forward to hearing from you

Vanessa

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