An integrated closed-loop polar transmitter with saturation prevention and low-IF receiver for quad-band GPRS/EDGE

Pullela, R.; Tadjpour, S.; Rozenblit, Dmitriy; Domino, William; Obkircher, Thomas; Said, Mohamed El; Ramachandran, Bala; Sowlati, T.; Agahi, Darioush; Chen, Weihong; Badillo, D.A.; Kahrizi, Masoud; Komaili, Jaleh; Wloczysiak, Stephane; Seckin, Utku; Choi, Yunyoung; Akyol, Hasan; Vadkerti, Martin; Mahjoob, Amir; Firouzkouhi, H.; Shum, Daniel; Suhanthan, Rajendra; Vakilian, Nooshin; Valencia, Tom; Dantec, Christophe; Paff, Aaron; Ahooie, Mona

doi:10.1109/isscc.2009.4977333

Cited by 21 publications

(5 citation statements)

References 4 publications

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“…Despite the complexity and implementation challenges related to polar architectures, several implementations have recently demonstrated the potential of polar PAs in CMOS [20]- [24]. Furthermore, the recent spur of start-up companies in this field is a clear sign of the potential of this approach.…”

Section: Polar Techniques To Achieve High Linearity and High Efficiencymentioning

confidence: 99%

Polar Modulation

Reynaert

2011

IEEE Microwave

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Section: Polar Techniques To Achieve High Linearity and High Efficiencymentioning

confidence: 99%

Polar Modulation

Reynaert

2011

IEEE Microwave

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“…In particular, many of the low IF-receiving circuits have been used as a mode for avoiding the influence of 1/f noise of the CMOS. Regarding transmitting systems, many modes have come to be used practically and other than direct conversion transmitting circuits, polar-loop transmitting circuits [19]- [22], in which AM modulation including negative feedback function to the earlier mentioned off-set PLL, the mode for directly modulating power amplifier [53], and the like have been made into practical use.…”

Section: Trend Of Integrated Rf Circuitsmentioning

confidence: 99%

Evolutional Trend of Mixed Analog and Digital RF Circuits

Tanaka

2009

IEICE Trans. Electron.

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This paper describes recent technology trend of mixed analog digital RF circuits. With the progress of CMOS technology, largescale digital signal process and control function can be integrated in an RF integrated circuit and some analog signal process blocks can be translated to digital signal processing units. At the same time, the design of remaining analog functional blocks becomes very hard. In this paper, those integration techniques for receiver and transmitter in these 20 years are reviewed. As a typical example of digital assisted systems, synthesizer based transmitters are discussed in detail.

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“…3.1.2, to save die area, reduce pin count, matching components and ease PCB-level routing. Each receive path is optimized to achieve low noise figure, high linearity, good blocking and spurious response characteristics typically required for a competitive GSM/EDGE receiver [2][3][4][5]. Measured performance is summarized in Fig.…”

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confidence: 99%

A quad-band class-39 RF CMOS receiver for evolved EDGE

Dellsperger¹,

Tschopp²,

Rogin³

et al. 2010

2010 IEEE International Solid-State Circuits Conference - (ISSCC)

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The cellular mobile terminal market continues to polarize between high-end smart phones and ultra-low-cost devices, with the former providing the only growth sector during the downturn recently. A key enabler for the popular smart phones, netbooks and other mobile broadband devices has been the high data rate provided by 3G standards, especially those capable of HSPA and beyond. A good user experience, however, still crucially depends on the fallback technology mode, which in most parts of the world consists of GSM/EDGE. While the basic EDGE provides a respectable substitute where coverage of 3G is absent, an enhanced EDGE is deemed desirable by the 3GPP community to lessen the data rate disparity between HSPA and legacy EDGE. Evolved EDGE (E-EDGE) is a recent (end of 2007) standard that aims to quintuple the peak data rate of EDGE to 1.2Mb/s, by phasing in a set of additional technical features that ultimately will include higher order modulation, downlink dual carrier (DLDC), mobile station receive diversity (MSRD), higher symbol rate (level B) and reduced latency [1]. This contribution describes an RF CMOS receiver that supports E-EDGE levels A and B, MSRD, as well as DLDC multi-slotting up to class 39. Figure 3.1.1shows the block diagram of the Evolved EDGE transceiver, where the dual-path receiver and related synthesizers are mostly responsible for the enhanced EDGE features outlined above. In a multiband transceiver the number of RF pins is often a concern, which becomes more acute when eight LNA inputs are required in a dual-receiver chip supporting quad-band. Single-ended input has been adopted in this design, and each group of 4 LNAs share a broadband common load as shown in Fig. 3.1.2, to save die area, reduce pin count, matching components and ease PCB-level routing. Each receive path is optimized to achieve low noise figure, high linearity, good blocking and spurious response characteristics typically required for a competitive GSM/EDGE receiver [2][3][4][5]. Measured performance is summarized in Fig. 3.1.3, where we highlight overall NF <2.5dB in the GSM 850/900 band, IIP3 close to 0dBm in the DCS/PCS band, ICP close to -20dBm for a 20MHz offset blocker in the DCS/PCS band, and 2dB to 6dB margin for 0.6MHz and 3MHz blocking tests.For both level-A and level-B Evolved EDGE, 16-and 32-QAM have been introduced to enhance data rate (known as EGPRS2). Receive EVM is therefore of particular importance. The receive paths in Fig. 3.1.1 have been optimized for EVM in terms of baseband filter characteristics, close-in phase noise of the synthesizers, image rejection ratio, as well as isolation between the two receivers. The upper half of Fig. 3.1.4 shows a 32-QAM signal constellation at receiver output, at legacy symbol rate of 270.833ks/s defined by level A. Due to inter-symbol interference inherent to the Gaussian filtering, the trajectories between symbols, seen on the instrument display, are inevitable. The lower half of the figure shows the measured error vectors (EVM < 3%) of all constellation points, dis...

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An integrated closed-loop polar transmitter with saturation prevention and low-IF receiver for quad-band GPRS/EDGE

Cited by 21 publications

References 4 publications

Polar Modulation

Polar Modulation

Evolutional Trend of Mixed Analog and Digital RF Circuits

A quad-band class-39 RF CMOS receiver for evolved EDGE

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