×

Transmitter for encoded data bits

  • US 5,815,531 A
  • Filed: 06/12/1996
  • Issued: 09/29/1998
  • Est. Priority Date: 06/12/1996
  • Status: Expired due to Term
First Claim
Patent Images

1. A transmitter for generating Quadrature Amplitude Modulated signals from data bits, the transmitter comprising:

  • first Quadrature Phase Shift Keying (QPSK) means for encoding a first pair of the data bits into one of four carrier signal phases, thereby producing a first QPSK signal;

    second QPSK means for encoding a second pair of the data bits into one of four carrier signal phases, thereby producing a second QPSK signal;

    a first power amplifier for amplifying the first QPSK signal to a first power level and supplying a first amplified signal at an output of the first power amplifier;

    a second power amplifier for amplifying the second QPSK signal to a second power level and supplying a second amplified signal at an output of the second power amplifier; and

    combining means for combining the first and second amplified signals to produce a signal in which four data bits are encoded.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×