Method of transmitting paging indicator and notification indicator and corresponding modulation and demodulation devices

A modulation device (1300) in a transmitter, which is for modulating a first signal and a second signal, wherein a probability of the appearance of signal bit “1” or “0” in each signal is remarkably higher than a probability of the appearance of “0” or “1”, the modulation device comprising:

• judgment means (1301), for receiving a joint signal of the first signal and the second signal in a wideband code-division multiple access network and for judging which combination state the joint signal is;
• pulse amplitude modulation means (1301), for, when the judgment means (1301) decides that the joint signal is a state combination with high probability of appearance which is not required to notify a user equipment, performing pulse amplitude modulation on the joint signal and outputting the result;
• and
• phase shift keying modulation means (1302), for, when the judgment means (1301) decides that the joint signal is a state combination which is required to notify a user equipment, performing conventional phase shift keying modulation on the joint signal and outputting the result.

A demodulation device (1400) in a signal receiver, which is for demodulating a joint signal of a first signal and a second signal, wherein a probability of the appearance of signal bit “1” or “0” in each signal of the first signal and the second signal is remarkably higher than a probability of the appearance of “0” or “1”, the demodulation device (1400) comprising:

• amplitude detecting pre-processor (1401), for performing amplitude detection pre-processing on the joint signal of the first signal and the second signal, which have gone through pulse amplitude modulation and conventional phase shit keying modulation respectively;
• amplitude detector (1402), for performing amplitude detection on a signal, which has gone through amplitude detection pre-processing, and then outputting a constellation point whose amplitude is 0;
• match filter bank (1403), for filtering a signal remaining after the amplitude detector (1402) has performed detection and outputting;
• and statistical decision means (1404), for calculating decision statistic for a signal which is output in three paths from the match filter bank (1403), selecting a largest decision variant and then outputting a constellation points which have gone through conventional phase shit keying modulation.

A method of transmitting a first signal and a second signal in a wideband code-division multiple access network, wherein a probability of the appearance of signal bit “1” or “0” in each signal of the first signal and the second signal is remarkably higher than a probability of the appearance of “0” or “1”, the method including:

• a step of determining constellation points, for determining combinations of different states of the first signal and the second signal and for determining each combination as a constellation point;
• a step of determining locations of constellation points, for determining a location of each constellation point on I-Q plane based on a priori knowledge of said combinations;
• and
• a step of transmission, for, after modulating said different combinations in different ways according to the location of each constellation point, transporting them to a user equipment via a physical channel, wherein said step of modulating constellation points adopts pulse amplitude modulation for a constellation point which is located on the origin of the I-Q plane, but adopts conventional phase shift keying modulation for other constellation points.