Abstract: Provided are an unambiguous positioning method for a satellite navigation system B1 wideband composite signal and an apparatus thereof, which can determine observed quantities of a plurality of satellites by means of tracking B1C signals and B1I signals in B1 wideband composite signals, determine a code pseudo-range value and pseudo-range value from each satellite to a receiver by means of the observed quantities, utilize the pseudo-range values and the code pseudo-range values to calculate ambiguity floating-point solutions of propagation delays of the B1 wideband composite signals, and obtain ambiguity integer solutions by means of the ambiguity floating-point solutions, so as to correct erroneously estimated propagation delay ambiguities of the B1 wideband composite signals, thereby obtaining unambiguous pseudo-range values, and implementing unambiguous and highly precise positioning of the location of the receiver.

Abstract: It is provided a joint receiver and receiving method for navigation signals located at adjacent frequencies. The joint receiving method includes: receiving a first navigation signal and a second navigation signal which are located at adjacent frequencies (S1); and calculating a frequency estimation of a virtual wideband navigation signal constructed based on the first navigation signal and the second navigation signal (S2), wherein the virtual wideband navigation signal is an asymmetric BOC-like navigation signal having a virtual carrier and a virtual sub-carrier. With the joint receiver and joint receiving method, not only power gain but also bandwidth gain can be obtained, and the ranging precision can be significantly improved.

Abstract: It is provided a joint receiver and receiving method for navigation signals located at adjacent frequencies. The joint receiving method includes: receiving a first navigation signal and a second navigation signal which are located at adjacent frequencies (S1); and calculating a frequency estimation of a virtual wideband navigation signal constructed based on the first navigation signal and the second navigation signal (S2), wherein the virtual wideband navigation signal is an asymmetric BOC-like navigation signal having a virtual carrier and a virtual sub-carrier. With the joint receiver and joint receiving method, not only power gain but also bandwidth gain can be obtained, and the ranging precision can be significantly improved.

Abstract: A receiver and a receiving method for receiving wideband binary-offset-carrier modulated signals. The receiver includes a tracking apparatus which includes an upper sideband processor operable to generate upper sideband correlations through correlating a local upper sideband replica against a received navigation signal, a lower sideband processor operable to generate lower sideband correlations through correlating a local lower sideband replica against the received navigation signal, and an estimator operable to determine a delay estimate based on the upper sideband correlations and the lower sideband correlations.

Abstract: The application relates to a spreading signal generating method, generating device, receiving method and receiving device. The spreading signal generating method comprises: generating a first spreading signal component and a second spreading signal component, wherein the first spreading signal component and the second spreading signal component each comprise a spreading code and a binary subcarrier, the spreading code of the first spreading signal component is the same as the spreading code of the second spreading signal component, the binary subcarrier of the first spreading signal component is different from the binary subcarrier of the second spreading signal component; and modulating the first spreading signal component and the second spreading signal component with radio frequency (RF) carriers so as to generate the spreading signal, where a phase of RF carrier for modulating the first spreading signal component is different from a phase of RF carrier for modulating the second spreading signal component.

Abstract: A receiver and a receiving method for receiving wideband binary-offset-carrier modulated signals. The receiver includes a tracking apparatus which includes an upper sideband processor operable to generate upper sideband correlations through correlating a local upper sideband replica against a received navigation signal, a lower sideband processor operable to generate lower sideband correlations through correlating a local lower sideband replica against the received navigation signal, and an estimator operable to determine a delay estimate based on the upper sideband correlations and the lower sideband correlations.

Abstract: The application relates to a generating method and device, receiving method and device for a dual-frequency constant envelope multiplexed signal with four spreading signals. According to the method, the four baseband spreading signals s1(t), s2(t), s3(t), s4(t) can be modulated to a frequency f1 and a frequency f2 respectively, so as to generate the constant envelope multiplexed signal on a radio carrier frequency fp=(f1+f2)/2, where the signals s1(t) and s2(t) are modulated on the frequency f1 with carrier phases orthogonal to each other, the signals s3(t) and s4(t) are modulated on the frequency f2 with carrier phases orthogonal to each other, f1>f2.

Abstract: The application relates to a spreading signal generating method, generating device, receiving method and receiving device. The spreading signal generating method comprises: generating a first spreading signal component and a second spreading signal component, wherein the first spreading signal component and the second spreading signal component each comprise a spreading code and a binary subcarrier, the spreading code of the first spreading signal component is the same as the spreading code of the second spreading signal component, the binary subcarrier of the first spreading signal component is different from the binary subcarrier of the second spreading signal component; and modulating the first spreading signal component and the second spreading signal component with radio frequency (RF) carriers so as to generate the spreading signal, where a phase of RF carrier for modulating the first spreading signal component is different from a phase of RF carrier for modulating the second spreading signal component.

Abstract: The application relates to a generating method and device, receiving method and device for a dual-frequency constant envelope multiplexed signal with four spreading signals. According to the method, the four baseband spreading signals s1(t), s2(t), s3(t), s4(t) can be modulated to a frequency f1 and a frequency f2 respectively, so as to generate the constant envelope multiplexed signal on a radio carrier frequency fp=(f1+f2)/2, where the signals s1(t) and s2(t) are modulated on the frequency f1 with carrier phases orthogonal to each other, the signals s3(t) and s4(t) are modulated on the frequency f2 with carrier phases orthogonal to each other, f1>f2.

Abstract: The application relates to a spreading signal generating method, generating device, receiving method and receiving device. The spreading signal generating method comprises: generating a first spreading signal component and a second spreading signal component, wherein the first spreading signal component and the second spreading signal component each comprise a spreading code and a binary subcarrier, the spreading code of the first spreading signal component is the same as the spreading code of the second spreading signal component, the binary subcarrier of the first spreading signal component is different from the binary subcarrier of the second spreading signal component; and modulating the first spreading signal component and the second spreading signal component with radio frequency (RF) carriers so as to generate the spreading signal, where a phase of RF carrier for modulating the first spreading signal component is different from a phase of RF carrier for modulating the second spreading signal component.

Abstract: The application relates to the satellite navigation signal, generating method, generating device, receiving method and receiving device. The navigation satellite signal generating device includes a baseband signal generator, a multiplexed signal generator and a modulator. The baseband signal generator is provided to generate a first baseband signal S1, a second baseband signal S2, a third baseband signal S3, and a fourth baseband signal S4. The multiplexed signal generator is provided to set an amplitude and a phase of an in-phase baseband component and an amplitude and a phase of a quadrature-phase baseband component of a signal into which the first baseband signal S1, the second baseband signal S2, the third baseband signal S3 and the fourth baseband signal S4 are multiplexed, so as to generate a multiplexed signal with constant envelope. The modulator is provided to modulate the multiplexed signal with constant envelope to a radio frequency, so as to generate the navigation satellite signal.

Abstract: The application relates to the satellite navigation signal, generating method, generating device, receiving method and receiving device. The navigation satellite signal generating device includes a baseband signal generator, a multiplexed signal generator and a modulator. The baseband signal generator is provided to generate a first baseband signal S1, a second baseband signal S2, a third baseband signal S3, and a forth baseband signal S4. The multiplexed signal generator is provided to set an amplitude and a phase of an in-phase baseband component and an amplitude and a phase of a quadrature-phase baseband component of a signal into which the first baseband signal S1, the second baseband signal S2, the third baseband signal S3 and the forth baseband signal S4 are multiplexed, so as to generate a multiplexed signal with constant envelope. The modulator is provided to modulate the multiplexed signal with constant envelope to a radio frequency, so as to generate the navigation satellite signal.