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diff --git a/gnuradio-examples/grc/trellis/readme.txt b/gnuradio-examples/grc/trellis/readme.txt deleted file mode 100644 index 9c7363af8..000000000 --- a/gnuradio-examples/grc/trellis/readme.txt +++ /dev/null @@ -1,32 +0,0 @@ -These are examples of using gr-trellis in grc. - -INTERFERENCE CANCELLATION -------------------------- -Two users are transmitting simultaneously using convolutionally encoded QPSK, each with power P1=alpha*P and P2=(1-alpha)*P. -The combined signal is observed in noise and four different receivers are considered: -1) A viterbi decoder decoding user 1 assuming user 2 is noise -2) A viterbi decoder decoding user 2 assuming user 1 is noise -3) A viterbi decoder decoding user 1 first - and then reencoding this signal, subtracting it from the observation - and then running a Viterbi decoder decoding user 2 -4) A viterbi decoder decoding user 2 first - and then reencoding this signal, subtracting it from the observation - and then running a Viterbi decoder decoding user 1 - -You can change the signal to noise ratio P/sigma^2 and the allocation of power to the two users, alpha. - - -Serially Concatenated Convolutional Codes ------------------------------------------ -An SCCC can be defined by an outer and an inner FSM together with an interleaver -and a modulation type. You can change the SNR and observe the estimated BER. -In sccc.grc the decoding and metric calculation are combined; in sccc1.grc they are separate. - -Parallel Concatenated Convolutional Codes ------------------------------------------ -A PCCC can be defined by two FSMs together with an interleaver -and a modulation type. You can change the SNR and observe the estimated BER. -In pccc1.grc the decoding and metric calculation are separate. - - -Enjoy. |