Method and apparatus for implementing high-order modulation schemes using low-order modulators

A modulation scheme, modulator technology, applied in multiple modulation transmitter/receiver arrangements, modulation, simultaneous amplitude and angle modulation, etc.

Inactive Publication Date: 2014-01-01
ALCATEL LUCENT SHANGHAI BELL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Additionally, the implementation of each of these schemes may require different har

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  • Method and apparatus for implementing high-order modulation schemes using low-order modulators
  • Method and apparatus for implementing high-order modulation schemes using low-order modulators
  • Method and apparatus for implementing high-order modulation schemes using low-order modulators

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Embodiment Construction

[0028] Various example embodiments of the invention will now be described more fully with reference to the accompanying drawings, in which some example embodiments of the invention are shown.

[0029] Specific illustrative embodiments of the present invention are disclosed herein. However, specific structural and functional details disclosed herein are merely representative for purposes of describing example embodiments of the present invention. This invention may, however, be embodied in many alternative forms and should not be construed as limited to only the embodiments set forth herein.

[0030] Accordingly, although the exemplary embodiments of the present invention are capable of various modifications and alternative forms, embodiments thereof will be described in detail herein by way of example in the drawings. It should be understood, however, that there is no intent to limit example embodiments of the invention to the particular forms disclosed, but on the contrary, ...

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Abstract

A processing device includes a plurality of modulators, the plurality of modulators performing modulation according to a first modulation scheme, a combiner configured to combine outputs from the plurality of modulators, and a signal processor configured to receive a bit stream and convert the bit stream into a plurality of input signals for the plurality of modulators such that the combiner generates a modulated output according to a second modulation scheme. The plurality of modulators may be low order modulators and a modulation schemes of the modulated output may include, for example, rotated quadrature phase shift keying (QPSK), pulse amplitude modulation (PAM), high order quadrature amplitude modulation (QAM), and multi-resolution high order quadrature amplitude modulation (M-QAM).

Description

technical field [0001] Example embodiments relate generally to implementing signal modulation schemes. Background technique [0002] Wireless communication networks provide wireless coverage to mobile stations traveling within the geographic area covered by the communication network. A wireless communication network includes a base station (BS) for transmitting data to mobile stations via wireless downlink connections. A mobile station can transmit data to a BS via a wireless uplink connection. Both the BS and the mobile station modulate the data before sending it. There are many different types of modulation schemes including, for example, Binary Phase Shift Keying (BPSK), Quadrature Phase Shift Keying (QPSK), Quadrature Amplitude Modulation (QAM) and Pulse Amplitude Modulation (PAM). Each of these modulation schemes is required for certain transmission types. Additionally, the implementation of each of these schemes may require different hardware configurations within ...

Claims

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Application Information

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IPC IPC(8): H04L27/36
CPCH04L27/0008H04L27/20H04L27/32H03C5/00
Inventor 李正张荣陈国勇D·科拉克陈海万宇冷加冠M·谢尔顿
Owner ALCATEL LUCENT SHANGHAI BELL CO LTD
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