Multiplier arrangement, signal modulator and transmitter
AssigneeAlcatel
InventorsJoannes Mathilda Josephus Sevenhans, Bart Verstraeten, Silvio Taraborrelli
Life of this patent
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Abstract
A multiplier arrangement (MUXER) is adapted to generate from analog phase information and from high-frequency local oscillator signals, components of a high-frequency phase vector (PV), and to synthesise said high-frequency phase vector (PV) from said components within a summing means is further adapted to provide said high-frequency phase vector (PV) as a vector which is making an excursion alongside the contours of a square within the complex plane during a first category of predetermined transitions of a phase signal (φ) on which said analog phase information is dependent. A signal modulator including such a multiplier arrangement as well as a transmitter are described as well.
Claims18
A multiplier arrangement comprising a pair of input terminals that receive analog phase information, said multiplier arrangement receiving a set of high-frequency local oscillator signals which are phase-shifted 90 degrees with respect to each other, said multiplier arrangement generating, from said analog phase information and from said high-frequency local oscillator signals, components of a high-frequency phase vector and synthesizing said high-frequency phase vector from said components within a summing means, wherein
- said multiplier arrangement receives a set of differential high frequency local oscillator signals and provides said high-frequency phase vector as a vector that is making an excursion alongside the contours of a square within a complex plane during a first category of predetermined transitions of a phase signal on which said analog phase information is dependent, said multiplier arrangement further comprising:
- a pair of output terminals on which said high-frequency phase vector is output as a differential high-frequency phase vector;
- a plurality of multipliers, each multiplier of said plurality having a respective input terminal that is coupled to a first terminal of an associated switch, a second terminal of said associated switch being coupled to one of said pair of input terminals of said multiplier arrangement or to a ground reference terminal under control of a respective control signal;
- and
- a set of control input terminals to which said respective control signals are provided.
A transmitter comprising:
- a transmit data source that delivers transmit data;
- a phase accumulator that determines a phase signal from said transmit data;
- an analog pulse shaper that generates analog phase information from said phase signal, wherein said analog phase information is generated as two balanced analog signals;
- a signal modulator according to claim6 that generates a high-frequency output signal from said analog phase information;
- and
- a power amplifier that amplifies said high-frequency output signal for further transmission to a receiver.
A multiplier arrangement comprising:
- a plurality of multipliers that receives at least two analog phase information signals and a set of differential high-frequency local oscillator signals that are phase-shifted 90 degrees with respect to each other, wherein each multiplier comprises an input switch that is coupled to one of said analog phase information signals or to a ground reference terminal under control of a respective control signal, said multiplier arrangement generating, from said analog phase information and from said high-frequency local oscillator signals, components of a high-frequency phase vector;
- and
- a summing circuit that synthesizes said high-frequency phase vector from said components, wherein said high-frequency phase vector is a vector that is making an excursion alongside the contours of a square within a complex plane during a first category of predetermined transitions of a phase signal on which said analog phase information is dependent.
Dependencies are inferred from the claim text.