Weiss-Weinstein bound for MIMO radar with colocated linear arrays for SNR threshold prediction
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(72) 7æ 5ì®® 5ì è ®D¯ 5ì è écë è ê {éN° ç °u±*ê3±° ® 1±°u± ¯ ° 5®D¯ì 8±¯ìé è Ga¶*BaÔBDe~lUl/º{ÔBDe CNl/¸UBDe CÌc´ @*CNS^í î uï{M SBDC*´R¸UBS·Ì5A MR´RÂN¸U¶*BJ@*C*µ5C*´u³JC½¸xQRTU? B¸k¼NQRTxQR[B¸UBDTxl e~lJQ [ÁQu¸UTUe PHl@Nmx¶H¸U¶NQu¸a¸U¶*B$Âô O O ´u³Je C*?TUBDO~Qu¸Ue ´ C^¶*´ O~S*l M <N. D. O N. D. ,D. SR. QP. UT. TWV. YX ZI. ;-. %EQD ,D UD. E. WWB. Θ = [u, βR , βI ]. 3×3. E. . ˆ −Θ Θ. . ˆ −Θ Θ. T . E. Gkl =. . ˆ −Θ Θ. . ˆ −Θ Θ. T . ¾ ¿ /. ≥ WWB = sup HG−1 HT , hi ,si i=1,2,3. e~lW¸U¶*B$fÓb5V4´RÂ3QRC5AÁ]aQ A Ble~QRCÁBl/¸Ue [ÁQu¸U´ T QRCNS ³J¶*BDTUB [ÁQu¸UTUe P^´R¸UBl/¸º{¼c´ e C¸xlDÄ#Ga¶*B$BDO BD[BDC¸xlJ´R¸U¶*B [ÁQu¸UTUe P QRTUB$? e d BDC^Ì5A ˆ Θ. 3×3. T. H = [h1 , h2 , h3 ]. e~lW¸U¶*B. 3×3. G. ¾ ¿. . E [Lsk (Y; Θ + hk , Θ) − L1−sk (Y; Θ − hk , Θ)][Lsl (Y; Θ + hl , Θ) − L1−sl (Y; Θ − hl , Θ)] , E {Lsk (Y; Θ + hk , Θ)} E {Lsl (Y; Θ + hl , Θ)}. 0. ³J¶*BDTUB MQRCNS ĽGa¶*B·BP¼cBm¸xQu¸Ue ´ CNl$QRTUB\¸xQRµ BDCÓ´ud BDT0¸U¶*B /´ e C¸ Ä ¼=S5 IJe ? ´ TU´ @NlO A MR¸U¶*B$Í@NQRC¸Ue ¸/A [\@Nl/¸ÌcB
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(134) -{0. . U. cB. \I]ID. 4bc4 . L^. . 3i. e. η 0 (Θ, α, γ). ! T X 1 p(Y; Θ + α) p(Y; Θ + γ) = N T N T exp − ζ(Θ, α, γ, t) , π σn t=1 1 2. 1 2.
(135) /. 1 1 [y − f (Θ + α, t)]H [y − f (Θ + α, t)] + 2 [y − f (Θ + γ, t)]H [y − f (Θ + γ, t)] 2 2σn 2σn 1 1 1 1 1 = 2 yH y − yH f (Θ + α, t) − yH f (Θ + γ, t) − f (Θ + α, t)H y − f (Θ + γ, t)H y σn 2 2 2 2 1 1 H H + f (Θ + α, t) f (Θ + α, t) + f (Θ + γ, t) f (Θ + γ, t) . 2 2. ζ(Θ, α, γ, t) =. E2BÒNC*B. z = y − 12 f (Θ + α, t) − 21 f (Θ + γ, t). M*³B$¶NQ d B 5. ¾/î ¿ ,0.
(136) ζ(Θ, α, γ, t) =. ¾/î R¿. 1 H 1 z z + ζ 0 (Θ, α, γ, t), 2 σn 4. 35. ³J¶*BDTUB S´5BlaC*´R¸0SBD¼cBDCNSF´ C MNQRCNS ζ 0 (Θ, α, γ, t) =. [f (Θ + α, t) − f (Θ + γ, t)]H [f (Θ + α, t) − f (Θ + γ, t)]. 1 2 σn. ÄkiW´ CNlBÍ@*BDC¸UO A M. ζ 0 (Θ, α, γ, t). Y. ! T X 1 0 1 H exp − ( 2 z z + ζ (Θ, α, γ, t)) dY σn 4 Ω t=1 ! T X1 ζ 0 (Θ, α, γ, t)) . = exp − 4 t=1. 1 η (Θ, α, γ) = N T N T π σn 0. Z. ·ÞÉÊ uÆuÝÊË ÏË ÁÆuÝÉÊ Ñ*TU´ [Ù¾/î ¿M¸U¶*BglB¸0´RÂ3ÂÃ@*CNm¸Ue ´ CNlae C5d ´ O d BSe C. 4 jF4 . . 3i. eJn. . WWB. ,6. η 0 (Θ, h1 , h1 ) = 1, η 0 (Θ, −h1 , −h1 ) = 1, 0. G11. ¾/î ¿ ,7. n. 2 − 21 (βR. βI2 )T. σk2 2 r=1 σn. PM PN. σk2 2 σn. . . 1 − cos. 4π λ h1 (ak. η0. u. Θ. 1 η(h1 , h1 ) = 2−h 2 , 2−h1 η(−h1 , −h1 ) = 2 , 1−h1 η(h1 , −h1 ) = , 2 PM PN σk 4π 2 1T σβ k=1 r=1 σ2 [1−cos( λ h1 (ak +br ))]+1 2 n 2−h1 1 . η(h1 , 0) = 2 2 1 PM PN σk2 1−cos σβ 2 T [ ( 2π k=1 r=1 σ2 λ h1 (ak +br ))]+1 n. Ga¶*B½lB¸J´RÂ3ÂÃ@*CNm¸Ue ´ CNlJe C5d ´ O d BSe C. Gkk , k = 2, 3. o. + br ) , o 1 − cos 2π . λ h1 (ak + br ). Ga¶*BDC7MNle CNmBgQRO O-¸U¶*B
(137) ÂÃ@*CNm¸Ue ´ CNl S´ÁC*´R¸0SBD¼cBDCNSF´ C MÌ5Ae C¸UBD? TxQu¸Ue C*?·³gÄ TÄ ¸Ä M*³B$´ ̸xQRe C. ¾ò ¿ (8. QRTUB$? e d BDCHÌ5A. η 0 (Θ, hk , hk ) = 1, η 0 (Θ, −hk , −hk ) = 1,. Ga¶*BDC7M. ,6. QRTUB$? e d BDCHÌ5A. η (Θ, h1 , −h1 ) = exp + k=1 n η 0 (Θ, h , 0) = exp − 1 (β 2 + β 2 )2T PM PN 1 R I k=1 r=1 2. . ¾/î ¿. PM σk2 η (Θ, hk , −hk ) = exp −h2k N T k=1 , 2 σn PM 2 σk η 0 (Θ, hk , 0) = exp − 41 h2k N T k=1 . 2 σn 0. . η(hk , hk ) = 1, η(−hk , −hk ) = 1,. 2 PM σk2 h η(hk , −hk ) = exp −h2k N T k=1 exp − σk2 , 2 σn β P 2 h2k η(h , 0) = exp − 1 h2 N T M k=1 σk exp − . k 4 k σ2 4σ 2 6. n. β. ¾òî ¿. ¾ò ò ¿.
(138) Ga¶*B½lB¸J´RÂ3ÂÃ@*CNm¸Ue ´ CNlJe C5d ´ O d BSe C . G12. QRTUB
(139) ? e d BDCHÌ5A. (. M X N X σk2 2π 2π 2 β 1 − cos h (a + b ) + β h 1 − cos h (a + b ) + 1 k r R 2 1 k r σ2 R λ λ k=1 r=1 n ) 2π 2π 1 2 2 h1 (ak + br ) − βI h2 sin h1 (ak + br ) + h2 , βI 1 − cos λ λ 2 ( M X N X σk2 2π 2π 2 η 0 (Θ, −h1 , −h2 ) = exp 2T β 1 − cos h (a + b ) − β h 1 − cos h (a + b ) + 1 k r R 2 1 k r σ2 R λ λ k=1 r=1 n ) 2π 2π 1 2 2 βI 1 − cos h1 (ak + br ) + βI h2 sin h1 (ak + br ) + h2 exp , λ λ 2 ( M X N 2 X σk 2π 2π 0 2 η (Θ, −h1 , h2 ) = exp 2T β 1 − cos h1 (ak + br ) + βR h2 1 − cos h1 (ak + br ) + σ2 R λ λ k=1 r=1 n ) 2π 2π 1 βI2 1 − cos h1 (ak + br ) + βI h2 sin h1 (ak + br ) + h22 exp , λ λ 2 ( M N 2 XX σ 2π 2π 2 0 k η (Θ, −h1 , −h2 ) = exp 2T β 1 − cos h1 (ak + br ) − βR h2 1 − cos h1 (ak + br ) + σ2 R λ λ k=1 r=1 n ) 2π 1 2 2π 2 βI 1 − cos h1 (ak + br ) − βI h2 sin h1 (ak + br ) + h2 exp . λ λ 2 0. η (Θ, h1 , h2 ) = exp 2T. ¾òRó¿. iW´ CNlBÍ@*BDC¸UO A M η(h1 , h2 ) = η(−h1 , h2 ) =. ¾ò 5¿. 2 − h1 t1 t2 , 2. 3-. ³J¶*BDTUB #) M N T X X σk2 2π 1 exp 1 − cos h1 (ak + br ) + 2 2 σ2 λ σβ k=1 r=1 n √ πσβ × n h io 12 , 2 2 P P σβ σk M N T 2π 1 4 2 2 k=1 r=1 σ2 1 − cos λ h1 (ak + br ) + σ2 n β h 2 i2 P P σk M N T 2π h2 2 k=1 r=1 σ2 sin λ h1 (ak + br ) n h P i t2 = exp 2 P σk N 4 T2 M 1 − cos 2π + σ12 2 k=1 r=1 σn λ h1 (ak + br ) β √ πσβ × n h io 12 . 2 σβ T PM PN σk2 2π 1 4 2 2 k=1 r=1 σ2 1 − cos λ h1 (ak + br ) + σ2 h2 t1 = exp − 22 2σβ. !. (. h22 4. ". b5e [e O~QRTUO A Mke ¸e~ll/¸UTxQRe ? ¶¸Âô TU³aQRTxSÓ¸U´lBDB^¸U¶NQu¸ ÄgÔBÁQRO~l´^¶NQ d B M M n. G12 = 0. ¾ò ¿ c/. ¾ò ¿ (0. ³J¶*e~mx¶7Mk¸U´ ? B¸U¶*BDT·³Je ¸U¶Õ¾ò 5¿M#O BQ SϸU´ M7QRCNS Ä\Ga¶*BDTUBÂô TUB Mc¸U¶*B·[ÁQu¸UTUe P e~l β. M. η(h1 , −h2 ) = η(−h1 , −h2 ). G21 = 0 G13 = 0 G31 = 0 G23 = 0. 7. G32 = 0. 3-. G.
(140) Se~QR? ´ CNQRO=³Je ¸U¶FBDO BD[BDC¸xla? e d BDCHÌ5A 2−h1 2. G11 = 2 . 2−h1. G22. G33. 2. −. σ2 β 1 2 2T σn. σ2 β 1 2 2T σn. PM. PN. k=1. PM. k=1. ¾ò R¿. 1−h1. 4π 2 r=1 σk [1−cos( λ h1 (ak +br ))]+1. 1. PN. r=1. σk2 [1−cos( 2π λ h1 (ak +br ))]+1. 2 PM σk2 h 1 − exp −h22 N T k=1 exp − σ22 2 σn β , PM =2 2 h22 1 2 k=1 σk exp − 2 h2 N T σ2 exp − 2σ2 n β 2 PM 2 σ h k 1 − exp −h23 N T k=1 exp − σ23 2 σn β , PM =2 2 h23 1 2 k=1 σk exp − 2 h3 N T σ2 exp − 2σ2 n. {5. 2 , . ¾ò ¿ (6. ¾ò ¿ (7. β. aG ¶NQRC*µl#¸U´½¸U¶*B$SBÒNC*e ¸Ue ´ C^´R e C¾/î 5¿M mDQRCÌcB
(141) TUBD³JTUe ¸¸UBDC^Q lWe C¾/îó¿ÄkX2le C*?·QRO Oc¸U¶*B$Q lUl@*[¼¸Ue ´ CNlWQRCNS TUBl@*O ¸xlJQRÌc´ud B M¸U¶*B½mO ´lBS5ºÂô TU[ BP¼*TUBlUle ´ C^´R¸U¶*Bg[ÁQu¸UTUe P mDQRCHÌcBg³JTUe ¸¸UBDC¹Q l ¾ó ¿ ;-. f (ϕ, h1 ). G11. WWB. h2 h2 h2 WWB = Diag sup 1 , sup 2 , sup 3 , h1 G11 h2 G22 h3 G33. c8. ³Je ¸U¶ ? e d BDCHe C&¾/îó¿M7¾ò ¿M*QRCNSϾò ¿MTUBl¼cBm¸Ue d BDO A Ä >0´R¸UB\¸U¶NQu¸½e CÓ¸U¶*B´ TUe ? e CNQROÂô TU[,´RÂW¸U¶*BÔBDe~lUl/º{ÔBDe CNl/¸UBDe CÌc´ @*CNS"¾ ¿M7³B¶NQ d B½¸U´F´ ¼¸Ue [e ÐDB·¸U¶*B[ÁQu¸UTUe P ³gÄ TÄ ¸Ä QRCNS Ägb5e CNmB SBD¼cBDCNS*l
(142) ´ C*O AH´ C Mc¸U¶*B\´ ¼¸Ue [e ÐQu¸Ue ´ C¹¸xQ lµHe~l2TUBS@NmBSF¸U´ ³J¶*e~mx¶ e~la[´ TUB
(143) ¸UTxQ m¸xQRÌ*O B Äk>0BP5¸M*³B$? e d BgQmO ´lBS5ºÂô TU[ BP¼*TUBlUle ´ CÂô T M M ¾ó*î ¿ (6. G11 , G22 , G33. (7. /. h1 , h2 ,. h3. WWB. h2k , ∀k sup Gkk hk. hi. Gii. h2. k sup Gkk k = 2, 3. hk. WWBkk = sup. x exp(−ax) , a > 0, − exp(−2ax)]. x≥0 2[1. ³J¶*BDTUB. x = h2k. QRCNS. a = NT. PM. 2 k=1 σk 2 2σn. +. 1 2 2σβ. Äk»{Â1³BgSBDC*´R¸UB. g(x) =. x exp(−ax) 2[1−exp(−2ax)]. M¸U¶*BDC. dg(x) exp(−ax) [1 − ax − exp(−2ax) − ax exp(−2ax)] = , dx 4[1 − exp(−2ax)]2. ³J¶*e~mx¶&e~l·QRO ³aQ Al$C*BD?Qu¸Ue d B ÄiW´ CNlBÍ@*BDC¸UO A M [ÁQuPe [\@*[ Qu¸ ÄkÑ3e CNQRO O A M*³B$´ ̸xQRe C7ö ∀x > 0. g(x). e~l·Q¹[´ C*´R¸U´ C*e~mDQRO O ASBmTUBQ le C*?FÂÃ@*CNm¸Ue ´ C4QRCNS&¶NQ l½e ¸xl. x=0. sup hk. ³J¶*e~mx¶Fm´ CNmO @NSBl¸U¶*Bg¼*TU´5´RÂ/Ä. 1 h2k PM = σk2 Gkk 2 N T k=1 + σ2. î. n. ,8. ¾óò ¿. 1 2 σβ. , k = 2, 3,. ¾ó ó¿.
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