摘要:
A receiver having a variable bit slicer for detecting bits in a demodulated signal, comprises a demodulator (14) for deriving a demodulated bit rate signal, means (36) for storing a plurality of threshold values, each of the threshold values being selectively adjustable, means (28, 38) for selecting the threshold value for comparison with the current bit signal (Sn) in response to a sequence of N bits (where N is at least 2) (Bn-1, Bn-2) received prior to the current bit (Bn) and means (38, 40) for using the current bit to update the selected threshold value.Also disclosed is a method of dc offset correction.
摘要翻译:具有用于检测解调信号中的比特的可变比特限制器的接收机包括用于导出解调比特率信号的解调器(14),用于存储多个阈值的装置(36),每个阈值可选择性地调整, 用于响应于N位序列(其中N至少为2),选择用于与当前位信号(S SUB n N)进行比较的阈值的装置(28,38)(B< 在当前位(B SUB)之前接收的n-1,b-n-2)和用于使用当前位的装置(38,40) 更新所选择的阈值。 还公开了一种直流偏移校正的方法。
摘要:
A multi-mode radio transmitter for use in mobile radio cellular standards, such as 2G, 2.5G and 3G, and a method of operating the transmitter in which an input signal is modulated independently of controlling the drive of a power amplifier (PA) module (40). The transmitter comprises circuitry (12, 60) for extracting the phase (θ) and amplitude (R) components from envelope information in the input signal. A modulator (110) uses the phase component (θ) to produce a constant-envelope signal comprising a phase modulated real signal at the transmitter frequency. This signal is multiplied in a multiplier (72) with either a fixed bias voltage (Vg1) to produce a constant envelope signal or a low level envelope tracking signal derived from an amplitude component (R) by a first amplitude control circuit (78) to produce a signal modulated exactly by the amplitude component. An output from the multiplier is applied to the PA module (40) having a control input (41). The PA module is controllable in a plurality of manners dependent on the characteristics and the required output power of the signal being transmitted. These manners include applying a predetermined fixed voltage to the control input or a less precise envelope tracking signal which is derived by a second amplitude control circuit (120) from the amplitude component (R).
摘要:
A polyphase receiver comprises an RF front end (10 to 28) for receiving a wanted data signal modulated on a carrier signal and for producing quadrature related low IF signals, an image rejection filter formed by a polyphase filter (30) for filtering the quadrature related low IF signals, soft limiting means (36,38) for compressing the dynamic range of the filtered quadrature related IF signals and a signal demodulator (41) for recovering the data signal. The soft limiting means (36,38) has a characteristic which is substantially linear at signal levels 10 dB below a predetermined minimum wanted signal level, moves into compression for higher signal levels and hard limits at substantially 10 dB above the desired receiver sensitivity which avoids degrading the sensitivity of the receiver.
摘要:
A radio receiver configurable to operate in either a low-IF or a zero-IF mode comprises a quadrature down-converter (108,110,112,114) for generating in-phase (I) and quadrature (Q) signals at an intermediate frequency and a complex filter (202) for performing image rejection filtering. One of the outputs (Q) of the filter (202) is terminated, the other (I) is passed to a non-complex ADC (206). The output from the ADC is processed digitally then a quadrature signal generator (212,214) generates quadrature-related IF signals which are passed to a down-converter (216,218) for conversion to baseband signals. By enabling analogue-to-digital conversion and channel filtering to be performed at IF on non-complex signals, significant power savings are possible. Further, the flexibility of the receiver is enhanced, enabling it to operate efficiently in both low-IF and zero-IF modes.
摘要:
A radio receiver is configurable to operate in both low-IF and zero-IF modes with maximum re-use of of analogue and digital circuitry between modes. The receiver comprises a quadrature down-converter for generating in-phase (I) and quadrature (Q) signals at an intermediate frequency and a complex filter for performing image rejection filtering. In the low-IF mode, one of the outputs (Q) of the filter is terminated, the other (I) is digitised by a non-complex ADC then the digital signal is filtered and decimated. Quadrature-related IF signals are then re-generated before down-conversion and demodulation. In the zero-IF mode, both outputs of the filter are digitised and processed in parallel before demodulation. By enabling analogue-to-digital conversion and channel filtering to be performed at low-IF on non-complex signals, use of just two non-complex ADCs is possible, thereby avoiding duplication of circuitry and providing significant power savings.
摘要:
A radio receiver is configurable to operate in both low-IF and zero-IF modes with maximum re-use of of analogue and digital circuitry between modes. The receiver comprises a quadrature down-converter (108,110,112,114) for generating in-phase (I) and quadrature (Q) signals at an intermediate frequency and a complex filter (516) for performing image rejection filtering.In the low-IF mode, one of the outputs (Q) of the filter (516) is terminated, the other (I) is digitised by a non-complex ADC (520), then the digital signal is filtered and decimated. Quadrature-related IF signals are then re-generated before down-conversion and demodulation.In the zero-IF mode, both outputs of the filter (516) are digitised and processed in parallel before demodulation.By enabling analogue-to-digital conversion and channel filtering to be performed at low-IF on non-complex signals, use of just two non-complex ADCs (120,1620) is possible, thereby avoiding duplication of circuitry and providing significant power savings.
摘要:
The present invention relates to antibodies that are immunoreactive to the mammalian, and more particularly, the human B7-H3 receptor and to uses thereof, particularly in the treatment of cancer and inflammation. The invention thus particularly concerns humanized B7-H3-reactive antibodies that are capable of mediating, and more preferably enhancing the activation of the immune system against cancer cells that are associated with a variety of human cancers.
摘要:
The present invention encompasses albumin fusion proteins. Nucleic acid molecules encoding the albumin fusion proteins of the invention are also encompassed by the invention, as are vectors containing these nucleic acids, host cells transformed with these nucleic acids vectors, and methods of making the albumin fusion proteins of the invention and using these nucleic acids, vectors, and/or host cells. Additionally the present invention encompasses pharmaceutical compositions comprising albumin fusion proteins and methods of treating, preventing, or ameliorating diseases, disorders or conditions using albumin fusion proteins of the invention.
摘要:
The present invention relates to 33 novel human secreted proteins and isolated nucleic acids containing the coding regions of the genes encoding such proteins. Also provided are vectors, host cells, antibodies, and recombinant methods for producing human secreted proteins. The invention further relates to diagnostic and therapeutic methods useful for diagnosing and treating diseases, disorders, and/or conditions related to these novel human secreted proteins.
摘要:
The present invention relates to novel human secreted proteins and isolated nucleic acids containing the coding regions of the genes encoding such proteins. Also provided are vectors, host cells, antibodies, and recombinant methods for producing human secreted proteins. The invention further relates to diagnostic and therapeutic methods useful for diagnosing and treating disorders related to these novel human secreted proteins.