Hestimate matrix in Alamouti OFDM communication

I noticed that the hestimate matrix in the 2x1 ofdm alamouti
communication has crazy values like:

sym: -0.0020 + j-0.0018 ks: -1.0000 + j+0.0000 eq: +282.3798 +
j-254.7796 ==> -1.0000 + j+0.0000
sym: +0.0017 + j+0.0022 ks: +0.0000 + j+0.0000 eq: +811.7408 +
j-449.4426 ==> +2.3752 + j+1.0470
sym: +0.0006 + j+0.0003 ks: +1.0000 + j+0.0000 eq: +1341.1019 +
j-644.1057 ==> +1.0000 + j+0.0000
sym: +0.0001 + j+0.0005 ks: +0.0000 + j+0.0000 eq: +656.4164 +
j-71.1795 ==> +0.0770 + j+0.3318
sym: -0.0001 + j-0.0020 ks: +1.0000 + j+0.0000 eq: -28.2691 +
j+501.7466 ==> +1.0000 + j+0.0000

meanwhile when I use a 1x1 ofdm communication I have pretty regular
values

sym: -0.0254 + j-0.0084 ks: -1.0000 + j+0.0000 eq: +35.4218 +
j-11.7727 ==> -1.0000 + j+0.0000
sym: +0.0004 + j+0.0049 ks: +0.0000 + j+0.0000 eq: +33.7460 +
j-10.3629 ==> +0.0633 + j+0.1618
sym: +0.0289 + j+0.0081 ks: +1.0000 + j+0.0000 eq: +32.0702 +
j-8.9531 ==> +1.0000 + j-0.0000
sym: -0.0011 + j+0.0022 ks: +0.0000 + j+0.0000 eq: +31.4286 +
j-12.1152 ==> -0.0078 + j+0.0822
sym: +0.0261 + j+0.0129 ks: +1.0000 + j+0.0000 eq: +30.7870 +
j-15.2773 ==> +1.0000 + j+0.0000

do you have any idea why this happens?

Any help will be appreciated

Vanessa

On Wed, Nov 9, 2011 at 9:44 AM, Vanessa Gardellin
[email protected] wrote:

On Tue, Nov 8, 2011 at 4:51 AM, Vanessa Gardellin
maximum ratio and equal gain (obviously not Alamouti). I know we were close

I am trying to use the alamouti code implemented by trondeau.
working one?
In the code you never used “d_phase_lut”… so this explain a lot of
function to recenter it. The fine frequency correct has already been

Thank you

Skype: gardellin.vanessa
56124 Pisa - ITALY

Skype: gardellin.vanessa


Vanessa GARDELLIN, Ph.D.
Researcher
Institute for Informatics and Telematics (IIT),
Italian National Research Council (CNR)
Via G. Moruzzi 1
56124 Pisa - ITALY
Phone: +390503153267
Room: B65/c
E-mail: [email protected]
WWW: http://www.iit.cnr.it/staff/vanessa.gardellin/
Skype: gardellin.vanessa

I noticed that the hestimate matrix in the 2x1 ofdm alamouti
communication has crazy values like:

sym: -0.0020 + j-0.0018 ks: -1.0000 + j+0.0000 eq: +282.3798 +
j-254.7796 ==> -1.0000 + j+0.0000
sym: +0.0017 + j+0.0022 ks: +0.0000 + j+0.0000 eq: +811.7408 +
j-449.4426 ==> +2.3752 + j+1.0470
sym: +0.0006 + j+0.0003 ks: +1.0000 + j+0.0000 eq: +1341.1019 +
j-644.1057 ==> +1.0000 + j+0.0000
sym: +0.0001 + j+0.0005 ks: +0.0000 + j+0.0000 eq: +656.4164 +
j-71.1795 ==> +0.0770 + j+0.3318
sym: -0.0001 + j-0.0020 ks: +1.0000 + j+0.0000 eq: -28.2691 +
j+501.7466 ==> +1.0000 + j+0.0000

meanwhile when I use a 1x1 ofdm communication I have pretty regular
values

sym: -0.0254 + j-0.0084 ks: -1.0000 + j+0.0000 eq: +35.4218 +
j-11.7727 ==> -1.0000 + j+0.0000
sym: +0.0004 + j+0.0049 ks: +0.0000 + j+0.0000 eq: +33.7460 +
j-10.3629 ==> +0.0633 + j+0.1618
sym: +0.0289 + j+0.0081 ks: +1.0000 + j+0.0000 eq: +32.0702 +
j-8.9531 ==> +1.0000 + j-0.0000
sym: -0.0011 + j+0.0022 ks: +0.0000 + j+0.0000 eq: +31.4286 +
j-12.1152 ==> -0.0078 + j+0.0822
sym: +0.0261 + j+0.0129 ks: +1.0000 + j+0.0000 eq: +30.7870 +
j-15.2773 ==> +1.0000 + j+0.0000

do you have any idea why this happens?

Any help will be appreciated

Vanessa

This forum is not affiliated to the Ruby language, Ruby on Rails framework, nor any Ruby applications discussed here.

| Privacy Policy | Terms of Service | Remote Ruby Jobs