초록 ▼

A message, e.g., a control message, a short message, a voice message or a data message, is transmitted on at least one of a first communications channel having a first redundancy level or a second communications channel having a second, higher redundancy level. A radio communications signal is recei

A message, e.g., a control message, a short message, a voice message or a data message, is transmitted on at least one of a first communications channel having a first redundancy level or a second communications channel having a second, higher redundancy level. A radio communications signal is received on one of the first communications channel and the second communications channel. The received radio communications signal is demodulated to recover the message using a first demodulation scheme if the radio communications signal is received on the first communications channel and using a second demodulation scheme if the radio communications signal is received on the second communications channel. According to an aspect of the invention, the received radio communications signal is coherently demodulated if the radio communications signal is received over the first communications channel and non-coherently demodulated if the radio communications signal is received over the second communications channel. According to another aspect, the message is transmitted on the first communications channel using a first modulation constellation, and transmitted on the second communications channel using a second modulation constellation representing a subset of the first modulation constellation. In other embodiments of the present invention, a first radio communications signal is transmitted representing the message encoded according to one of a first code or a second code that represents a concatenation of the first code and an additional code, such as an orthogonal code or a quasi orthogonal code. Related systems and apparatus are also described.

대표청구항 ▼

[ That which is claimed is:] [1.]1. In a wireless communications system including at least one base station operative to serve a plurality of subscriber units, a method of communicating comprising the steps of:transmitting a message on at least one of a first communications channel having a first re

[ That which is claimed is:] [1.]1. In a wireless communications system including at least one base station operative to serve a plurality of subscriber units, a method of communicating comprising the steps of:transmitting a message on at least one of a first communications channel having a first redundancy level or a second communications channel having a second redundancy level greater than the first redundancy level; andreceiving a radio communications signal on one of the first communications channel and the second communications channel; anddemodulating the received radio communications signal to recover the message using a first demodulation scheme if the radio communications signal is received on the first communications channel and using a second demodulation scheme if the radio communications signal is received on the second communications channel, wherein said step of demodulating comprises the step of coherently demodulating the received radio communications signal if the radio communications signal is received over the first communications channel and non-coherently demodulating the received radio communications signal if the radio communications signal is received over the second communications channel.