diff options
Diffstat (limited to 'src/TII.cpp')
| -rw-r--r-- | src/TII.cpp | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/src/TII.cpp b/src/TII.cpp index 09a4920..a9eee16 100644 --- a/src/TII.cpp +++ b/src/TII.cpp @@ -230,8 +230,16 @@ int TII::process(Buffer* dataIn, Buffer* dataOut) return 1; } -void TII::enable_carrier(int k) { - int ix = m_carriers/2 + k; +void TII::enable_carrier(int k) +{ + /* The OFDMGenerator shifts all positive frequencies by one, + * i.e. index 0 is not the DC component, it's the first positive + * frequency. Because this is different from the definition of k + * from the spec, we need to compensate this here. + * + * Positive frequencies are k > 0 + */ + int ix = m_carriers/2 + k + (k>=0 ? -1 : 0); if (ix < 0 or ix+1 >= (ssize_t)m_Acp.size()) { throw TIIError("TII::enable_carrier invalid k!"); @@ -240,7 +248,8 @@ void TII::enable_carrier(int k) { m_Acp[ix] = true; } -void TII::prepare_pattern() { +void TII::prepare_pattern() +{ int comb = m_conf.comb; // Convert from unsigned to signed std::lock_guard<std::mutex> lock(m_enabled_carriers_mutex); |