MATLAB Answers

how to compand the complex valued signal

4 views (last 30 days)
ABDUL
ABDUL on 21 Nov 2020
Commented: ABDUL on 23 Nov 2020
hello ..
my input to the comapader is a complex valued signal .it is showing an error
ofdm_signal=[-0.999999999999998 - 1.00000000000001i 4.44089209850063e-16 + 1.00000000000001i 2.00395255944841e-14 - 0.999999999999994i -1.19904086659517e-14 - 1.00000000000004i 0.999999999999980 - 3.52495810318487e-15i -4.44089209850063e-15 + 1.88737914186277e-14i 1.00000000000000 + 0.999999999999999i -7.21644966006352e-15 - 2.44249065417534e-15i -9.44209987974176e-15 + 0.999999999999996i 1.00000000000001 - 0.999999999999996i -2.08270900525775e-14 + 0.999999999999982i -1.09356967925578e-14 + 1.05471187339390e-15i 0.999999999999996 + 3.05311331771918e-14i -3.99680288865056e-15 + 0.999999999999992i 1.04360964314765e-14 - 0.999999999999980i 6.88338275267597e-15 + 6.99440505513849e-15i 1.39332989590457e-14 - 7.77156117237610e-15i 7.77156117237610e-16 - 1.00000000000001i 1.00000000000000 - 1.00000000000002i 0.999999999999977 + 1.00000000000000i 0.999999999999984 + 1.00000000000001i 0.999999999999996 + 3.04756220259606e-14i -0.999999999999983 + 1.00000000000001i 1.31006316905768e-14 + 9.93649607039515e-15i 1.00000000000003 - 1.00000000000000i -1.00000000000001 + 0.999999999999984i 1.00000000000002 + 1.78549204755525e-14i -0.999999999999995 - 1.00000000000002i 1.00000000000000 - 1.00475183728577e-14i 1.00000000000000 - 1.00000000000000i -1.00000000000000 - 1.94844140821715e-14i 0.999999999999992 + 2.46469511466785e-14i -0.999999999999991 - 1.73194791841524e-14i 0.999999999999976 - 2.92127433354494e-15i 1.00000000000002 + 5.16253706450698e-15i -8.02136135291676e-15 - 1.18793863634892e-14i -1.00000000000001 + 1.87072579649339e-14i 5.55111512312578e-15 + 8.21565038222616e-15i -0.999999999999998 + 2.55351295663786e-15i 1.05471187339390e-14 + 3.52495810318487e-15i 1.29844052176864e-14 + 3.60822483003176e-16i 1.00000000000001 - 1.00000000000001i 1.25940924355916e-15 - 2.00950367457153e-14i 0.999999999999989 - 1.47104550762833e-15i 4.77395900588817e-15 - 4.44089209850063e-15i -6.10622663543836e-15 - 1.84297022087776e-14i -9.74220704108575e-15 + 3.88578058618805e-15i -1.43218770176645e-14 + 1.00000000000001i -0.999999999999987 + 1.00000000000001i -1.00000000000000 - 1.00000000000000i -1.09912079437891e-14 - 0.999999999999997i 2.39808173319034e-14 + 0.999999999999991i -1.00000000000000 + 6.21724893790088e-15i 1.00000000000001 - 0.999999999999995i 3.01980662698043e-14 + 0.999999999999980i -2.29816166097407e-14 - 2.53685961126848e-14i -1.60982338570648e-14 - 1.00000000000000i 0.999999999999998 - 1.00000000000001i -1.57651669496772e-14 - 6.41962332191343e-15i -1.00000000000002 - 1.00000000000000i 0.999999999999990 - 2.27595720048157e-15i -4.99600361081320e-15 + 1.00000000000002i 3.33066907387547e-16 - 0.999999999999976i 4.99600361081320e-16 - 1.00000000000002i -2.55351295663786e-15 + 1.18793863634892e-14i 1.00000000000000 - 0.999999999999993i -1.00000000000001 - 0.999999999999989i 1.00000000000001 - 4.99600361081320e-15i 0.999999999999993 + 1.94289029309402e-16i 6.66133814775094e-16 + 0.999999999999998i 3.21964677141295e-15 - 1.10467190950203e-14i -1.00000000000001 - 0.999999999999984i 2.93688684482873e-15 + 1.00000000000002i 1.01030295240889e-14 - 1.00000000000001i -6.28316842998800e-15 - 0.999999999999995i -0.999999999999988 - 0.999999999999997i -0.999999999999983 + 0.999999999999999i -1.00000000000001 - 1.00000000000001i -0.999999999999996 + 1.00000000000000i -0.999999999999997 + 0.999999999999991i 1.00000000000000 - 1.00000000000001i -1.00000000000001 - 3.50087924294176e-15i 1.65700786425305e-14 + 1.00000000000002i 3.85802501057242e-15 - 1.00000000000002i -2.30628116840344e-14 - 1.06581410364015e-14i -1.00000000000000 + 1.00000000000001i -6.52256026967280e-15 + 0.999999999999999i 1.00000000000002 + 5.21804821573824e-15i -0.999999999999993 - 0.999999999999995i 1.00000000000001 - 2.28814722443234e-14i -6.43929354282591e-15 + 0.999999999999992i -8.49961934509640e-15 - 1.01030295240889e-14i -1.27675647831893e-14 + 1.00000000000000i -3.05311331771918e-15 + 1.00000000000001i 0.999999999999991 + 0.999999999999998i 1.00000000000001 + 3.44169137633799e-15i -1.83741910575463e-14 + 0.999999999999985i 0.999999999999997 + 2.96290769696839e-15i -3.33066907387547e-15 - 1.03805852802452e-14i -1.81243908770057e-14 + 0.999999999999992i -2.93098878501041e-14 + 0.999999999999999i -1.00000000000002 + 1.00000000000003i 1.12687636999453e-14 - 0.999999999999986i 0.999999999999985 + 8.07687250414801e-15i 1.92571653068185e-14 + 5.27355936696949e-16i -1.00000000000002 + 1.36557432028894e-14i -9.84282100269240e-15 + 1.00000000000001i 1.11022302462516e-16 + 1.23512311489549e-14i 0.999999999999994 + 1.00000000000002i 9.54791801177635e-15 - 0.999999999999978i -5.85642645489770e-15 - 0.999999999999994i 1.00000000000002 + 2.33146835171283e-14i 1.34336985979644e-14 + 2.41473507855972e-14i 2.08166817117217e-14 - 8.48952942300993e-15i 6.24500451351651e-15 + 9.21485110438880e-15i 3.13360448700450e-14 + 1.25455201782643e-14i 1.46847711532209e-14 - 5.88418203051333e-15i 8.77076189453874e-15 - 4.10782519111308e-15i 2.67286193178506e-14 + 1.00000000000000i 7.77156117237610e-15 - 1.00000000000003i 2.12607709215717e-14 - 1.00000000000002i -4.55191440096314e-15 - 1.94397808679854e-14i -1.00000000000002 + 0.999999999999994i 1.20523330238969e-14 - 0.999999999999995i -0.999999999999988 - 2.49245069028348e-14i 0.999999999999969 - 1.69864122767649e-14i -4.38538094726937e-15 + 7.32747196252603e-15i -3.33066907387547e-15 - 2.22044604925031e-15i -0.999999999999998 - 1.00000000000001i 4.44089209850063e-16 + 1.00000000000001i 2.00395255944841e-14 - 0.999999999999994i -1.19904086659517e-14 - 1.00000000000004i 0.999999999999980 - 3.52495810318487e-15i -4.44089209850063e-15 + 1.88737914186277e-14i 1.00000000000000 + 0.999999999999999i -7.21644966006352e-15 - 2.44249065417534e-15i -9.44209987974176e-15 + 0.999999999999996i 1.00000000000001 - 0.999999999999996i -2.08270900525775e-14 + 0.999999999999982i -1.09356967925578e-14 + 1.05471187339390e-15i 0.999999999999996 + 3.05311331771918e-14i -3.99680288865056e-15 + 0.999999999999992i 1.04360964314765e-14 - 0.999999999999980i 6.88338275267597e-15 + 6.99440505513849e-15i 1.39332989590457e-14 - 7.77156117237610e-15i 7.77156117237610e-16 - 1.00000000000001i 1.00000000000000 - 1.00000000000002i 0.999999999999977 + 1.00000000000000i 0.999999999999984 + 1.00000000000001i 0.999999999999996 + 3.04756220259606e-14i -0.999999999999983 + 1.00000000000001i 1.31006316905768e-14 + 9.93649607039515e-15i 1.00000000000003 - 1.00000000000000i -1.00000000000001 + 0.999999999999984i 1.00000000000002 + 1.78549204755525e-14i -0.999999999999995 - 1.00000000000002i 1.00000000000000 - 1.00475183728577e-14i 1.00000000000000 - 1.00000000000000i -1.00000000000000 - 1.94844140821715e-14i 0.999999999999992 + 2.46469511466785e-14i];
A = 10; % Parameter for A-law compander
V = max(abs(ofdm_signal));
compsig = compand(ofdm_signal,A,V,'A/compressor');
Error using compand (line 35)
Inputs IN, PARAM and V must be real numbers.
how do i over come this error in matlab R2020a

  0 Comments

Sign in to comment.

Answers (1)

Walter Roberson
Walter Roberson on 21 Nov 2020
https://www.mathworks.com/help/comm/ref/compand.html#fp1068641
Look in the Algorithms section, which gives the formulas. Those formulas can be used on complex valued signals.

  1 Comment

ABDUL
ABDUL on 23 Nov 2020
do we have to write the matlab code for implementing the compander by using the equations given in the algorithms section. is it not possible to implement by using the compand function in matlab r2020

Sign in to comment.

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!