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Enhanced bit mapping for digital interface of a wireless communication equipment in multi-time slot and multi-mode operation

A technology of wireless communication equipment and digital interface, which is applied in the field of digital baseband transmission path and can solve the problems of insufficient industrial standards and so on.

Inactive Publication Date: 2007-07-04
NXP BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] The industry standard is not sufficient

Method used

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  • Enhanced bit mapping for digital interface of a wireless communication equipment in multi-time slot and multi-mode operation
  • Enhanced bit mapping for digital interface of a wireless communication equipment in multi-time slot and multi-mode operation
  • Enhanced bit mapping for digital interface of a wireless communication equipment in multi-time slot and multi-mode operation

Examples

Experimental program
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Embodiment Construction

[0038] As mentioned above, it is schematically shown in Fig. 1 that the digital baseband transmission path of the wireless communication device includes a digital baseband processor (or device) BBD and a baseband interface device BAI, and the baseband interface device BAI includes at least a modulator M, a gain control The filter GC and the digital-to-analog converter DAC filter are connected to the digital baseband device BBD through the digital interface I. The digital baseband transmission path is connected with radio frequency (RF) device RFD, RFD itself is connected with power amplifier PA, and PA is connected with antenna AN. The digital baseband transmission path, the radio frequency (RF) device RFD and the power amplifier PA form the transmission path.

[0039] It is important to note that the gain stages of the digital baseband transmit path are usually distributed, including a part of the gain controller GC inside the baseband interface device BAI (in digital or anal...

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Abstract

A control device (CD) is dedicated to the control of the transmission of coded values onto a digital interface (I) connecting a baseband device (BBD) and a baseband interface device (BAI), comprising at least a modulator (M) feeding a gain controller (GC), of a wireless communication equipiment. The control device (CD) comprises a storing means (MM1) for storing a coding table establishing a correspondence between symbols for the baseband interface device (BAI) and coding values to transmit to this radiofrequency device through the digital interface (I). Tie coding table comprises a first group of symbols comprising data words for feeding the modulator (M) and a second group of symbols comprising command words for controlling the operation of the modulator (M) and / or the gain controller (GC). The control device (CD) also comprises a control means (CRM) arranged, when it receives a symbol from the baseband device (BBD), to determine in the storing means (MM 1) the coded value corresponding to this symbol in order it could be transmitted to the baseband interface device (BAI) through the digital interface (I).

Description

technical field [0001] The present invention relates to digital baseband transmit paths of wireless communication devices, and more particularly to control of modulators and / or gain controllers of such devices through digital interfaces. Background technique [0002] In some communication networks, eg GSM (Global System for Mobile Communications), it has been proposed to increase the data rate by new standards such as the so-called EGPRS standard (Enhanced General Packet Radio Service). For example, the EGPRS standard introduces a new modulation scheme, 8PSK (8-Phase Shift Keying), in GSM networks to increase the data rate previously provided by the GMSK (Gaussian Minimum Shift Keying) modulation scheme. [0003] To achieve flexibility in data transmission, the EGPRS standard defines multi-slot (or multi-slot) and multi-mode operation, which requires the use of more than one of the eight time slots dividing the GSM frame for GMSK or 8PSK modulated data emission. Thus, an E...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/00H04B1/40H04B1/20H04B7/005
CPCH04W52/04H04L27/0008H04L27/00H04B1/20H04B1/40H04B7/005
Inventor M·赫尔芬施泰因H·鲍尔P·博德R·迪特施
Owner NXP BV
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