Learn More
—Bergmans and Cover identified the capacity region of the Gaussian degraded broadcast channel, where different receivers observe the transmitted signal with different signal-to-noise ratios. This letter presents a superposition turbo-coding scheme that performs within 1 dB of the capacity region boundary of the degraded broadcast channel at a bit-error rate(More)
A&ract-In the so-called " twin paradox " of relativity theory, one spaceship leaves another at velocity o = /3c and returns to find that the other ship has aged more by a factor y = (1-/?2)-'/2. The asymmetty is first isolated in order to resolve the paradox. Then the principle of relativity is used to derive the relative aging factor y and the relativistic(More)
  • 1