WT11 Datasheet - Glyn Store

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7. ENHANCED DATA RATE EDR has been introduced to provide 2x and optionally 3x data rates with minimal disruption to higher layers of the Bluetooth stack. CSR supports both of the new data rates, with <strong>WT11</strong>. <strong>WT11</strong> is compliant with revision v2.0.E.2 of the specification. 7.1 Enhanced Data Rate Baseband At the baseband level EDR uses the same 1.6kHz slot rate as basic data rate and therefore the packets can be 1, 3, or 5 slots long as per the basic data rate. Where EDR differs from the basic data rate is that in the same 1MHz symbol rate 2 or 3bits are used per symbol, compared to 1bit per symbol used by the basic data rate. To achieve the increase in number of bits symbol, two new modulation schemes have been introduced as summarized in Table 11 presented below and the modulation schemes are explained in the further sections. Scheme Bits per symbol Modulation Basic data rate 1 GFSK Enhanced data rate 2 P/4 DQPSK Enhanced data rate 3 8DPSK (optional) Table 11: Data rate schemes Although the EDR uses new packets Link establishment and management are unchanged and still use Basic Rate packets. 7.2 Enhanced Data Rate /4 DQPSK 4-state Differential Phase Shift Keying 2 bits determine phase shift between consecutive symbols 2 bits determine phase shift between consecutive symbols S/4 rotation avoids phase shift of S, which would cause large amplitude variation Raised Cosine pulse shaping filter to further reduce side band emissions 7.3 8DQPSK Bit pattern Phase shift 00 01 10 11 Table 12: 2 bits determine phase shift between consecutive symbols 8-state Differential Phase-Shift Keying Three bits determine phase shift between consecutive symbols. 39
Bit pattern Phase shift Table 13: 3 bits determine phase shift between consecutive symbols Figure 29: 8DQPSK 40
Page 1 and 2: WT11 Data Sheet V e r s i o n 3 . 1
Page 3 and 4: Contents: 1. Block Diagram and Desc
Page 5 and 6: TERMS & ABBREVIATIONS Term or Abbre
Page 7 and 8: 1. BLOCK DIAGRAM AND DESCRIPTIONS B
Page 9 and 10: 802.11 Coexistence Interface Dedica
Page 11 and 12: Current consumption Test conditions
Page 13 and 14: Output power (dBm) 18 16 14 12 10 8
Page 15 and 16: Figure 6: WT11 internal reset circu
Page 17 and 18: 4. PHYSICAL INTERFACES 4.1 UART Int
Page 19 and 20: UART bus to be connected to the WT1
Page 21 and 22: WT12 PIO USB_D+ USB_D- USB_ON 20 R
Page 23 and 24: USB_DETACH USB_WAKE_UP 4.2.6 USB Dr
Page 25 and 26: 4.4 PCM Interface Pulse Code Modula
Page 27 and 28: PCM_SYNC PCM_CLK PCM_OUT PCM_IN und
Page 29 and 30: 13-bit sample PCM_OUT 1 2 3 4 5 6 7
Page 31 and 32: 5. I/O PARALLEL PORTS The Parallel
Page 33 and 34: Notes: More details of iWRAP softwa
Page 35 and 36: Radio transmitter enable/disable -
Page 37 and 38: Full support for all Bluetooth powe
Page 39: The execution environment is struct
Page 43 and 44: GND area with stitching vias 42 Edg
Page 45 and 46: 2.3 mm WT11-E Dimensions Tolerances
Page 47 and 48: 10. PACKAGE Figure 35: Reel informa
Page 49 and 50: 11. CERTIFICATIONS WT11 is complian
Page 51 and 52: 11.2.1 FCC antenna designation FCC
Page 53 and 54: 12. ROHS STATEMENT WITH A LIST OF B

WT11 Datasheet - Glyn Store

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