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2. Phase-shift keying - Wikipedia

   en.wikipedia.org/wiki/Phase-shift_keying

   In reaching 5.5 Mbit/s and the full rate of 11 Mbit/s, QPSK is employed, but has to be coupled with complementary code keying. The higher-speed wireless LAN standard, IEEE 802.11g-2003, [10] [12] has eight data rates: 6, 9, 12, 18, 24, 36, 48 and 54 Mbit/s. The 6 and 9 Mbit/s modes use OFDM modulation where each sub-carrier is BPSK modulated.

3. Wikipedia : Peer review/Phase-shift keying/archive1

   en.wikipedia.org/wiki/Wikipedia:Peer_review/...

   BPSK is the most simple to understand, so the BPSK concept should be introduced in the lead. In its most simple form a regular sinewave is used to represent binary 0; and a 'cosine' wave (180° phase shift) is used to represent binary 1. This should be supported by a diagram alongside. (You can clip the QPSK image, first line-0110 to illustrate ...

4. Bit error rate - Wikipedia

   en.wikipedia.org/wiki/Bit_error_rate

   BER comparison between BPSK and differentially encoded BPSK with gray-coding operating in white noise. In a noisy channel, the BER is often expressed as a function of the normalized carrier-to-noise ratio measure denoted Eb/N0 , (energy per bit to noise power spectral density ratio), or Es/N0 (energy per modulation symbol to noise spectral ...

5. Barker code - Wikipedia

   en.wikipedia.org/wiki/Barker_code

   A Barker code resembles a discrete version of a continuous chirp, another low-autocorrelation signal used in other pulse compression radars. The positive and negative amplitudes of the pulses forming the Barker codes imply the use of biphase modulation or binary phase-shift keying ; that is, the change of phase in the carrier wave is 180 degrees.

6. Coding gain - Wikipedia

   en.wikipedia.org/wiki/Coding_gain

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7. Minimum-shift keying - Wikipedia

   en.wikipedia.org/wiki/Minimum-shift_keying

   Power spectral density of MSK, BPSK, and QPSK. The side-lobes of MSK are lower (−23 dB) than in both BPSK and QPSK cases (−10 dB). Therefore, the inter-channel interference is lower in MSK case. Moreover, the main lobe of the MSK signal is wider, which means more energy in the null-to-null bandwidth.